Terms of Service

PregnancyDueCalculatorByConception.com is a free, independently operated online tool that helps expectant parents estimate their pregnancy due date using multiple calculation methods. Our calculator supports three primary input methods: the last menstrual period (LMP) date method using Naegele's rule, the conception date method, and the IVF transfer date method. We also provide an ovulation calculator, pregnancy week-by-week guide, and pregnancy test timing calculator — all completely free of charge.

We created this service because we understand how important it is for expectant parents to have a reliable estimate of their due date. Knowing your estimated due date helps you plan for prenatal appointments, maternity leave, nursery preparation, and the many other milestones that come with welcoming a new baby. While only your healthcare provider can determine your official due date, our calculator gives you a helpful starting point based on established obstetric formulas from ACOG and WHO.

Our website is supported by advertising revenue through Google AdSense, which allows us to provide this service completely free of charge to all users. We are not affiliated with, endorsed by, or connected to any medical organization, hospital, or healthcare provider. We are a privately owned informational resource dedicated to helping individuals understand their estimated pregnancy timeline.

By accessing and using PregnancyDueCalculatorByConception.com (the "Service"), you accept and agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, you must not access or use the Service. These Terms apply to all visitors, users, and others who access or use the Service.

We reserve the right to update or modify these Terms at any time without prior notice. Your continued use of the Service following any changes constitutes acceptance of those changes. We recommend that you review these Terms periodically to stay informed of any updates. The "Last Updated" date at the top of this page indicates when these Terms were last revised.

These Terms constitute a legally binding agreement between you and PregnancyDueCalculatorByConception.com. By using the Service, you represent that you are at least 18 years of age, or that you are the age of majority in your jurisdiction, and that you have the legal capacity to enter into this agreement. If you are using the Service on behalf of an organization, you represent that you have the authority to bind that organization to these Terms.

PregnancyDueCalculatorByConception.com provides a free online tool that allows users to estimate their pregnancy due date using their last menstrual period date, conception date, or IVF transfer date. The Service also provides an ovulation calculator, pregnancy week calculator, and pregnancy test calculator. The Service is provided "as is" and is intended for informational and educational purposes only. It is not a substitute for professional medical advice.

You agree to use the Service only for lawful purposes and in accordance with these Terms. You agree not to use the Service in any way that violates any applicable federal, state, local, or international law or regulation. You must not attempt to gain unauthorized access to any portion of the Service, any systems or networks connected to the Service, or any server or computer connected to the Service.

You agree not to use the Service to: (a) transmit any virus, worm, malware, or any other malicious or destructive code; (b) interfere with or disrupt the Service or servers or networks connected to the Service; (c) collect or harvest the personal information of other users; (d) use the Service for any commercial purpose without our express written permission; (e) attempt to reverse engineer, decompile, or disassemble any portion of the Service; or (f) use automated scripts, bots, or scraping tools to access the Service.

We reserve the right to terminate or restrict your access to the Service at any time, without notice, for any reason, including but not limited to a violation of these Terms. We also reserve the right to modify, suspend, or discontinue the Service (or any part thereof) at any time without notice, and we will not be liable to you or any third party for any modification, suspension, or discontinuation of the Service.

Our pregnancy due date calculator uses three established obstetric methods to estimate your expected delivery date. The LMP method applies Naegele's rule, which adds 280 days (40 weeks) to the first day of your last menstrual period. The conception date method adds 266 days (38 weeks) to the date of conception, based on the assumption that conception typically occurs approximately 14 days after the start of the last menstrual period. The IVF transfer date method uses specific formulas based on the type of transfer (Day 3 or Day 5 embryo) to calculate the estimated due date.

In addition to the due date, our calculator provides supplementary information including your estimated conception date, current pregnancy week, trimester, and key milestone dates such as when to schedule your first prenatal appointment, when to expect certain prenatal screenings, and the range of dates considered full term (39-40 weeks). This information is based on guidelines from the American College of Obstetricians and Gynecologists (ACOG) and the World Health Organization (WHO).

It is important to understand that due dates are inherently estimates. Research shows that only about 5% of babies are born on their exact due date, with the vast majority arriving within a two-week window before or after the estimated date. Your healthcare provider may adjust your due date based on ultrasound measurements, particularly during the first trimester when ultrasound dating is most accurate. Our calculator does not account for irregular menstrual cycles, multiple gestations, or other individual factors that may affect your due date.

The pregnancy due date calculator provided on this website is designed to give you a general estimate of your expected delivery date based on standard obstetric formulas. While we make every effort to ensure that our calculator uses accurate and up-to-date calculation methods, including Naegele's rule for LMP-based estimates, the conception date method, and IVF-specific formulas, we cannot guarantee that the results will match the due date determined by your healthcare provider.

The calculator relies on established obstetric guidelines from ACOG and WHO. However, due dates are inherently estimates — only about 5% of babies are born on their exact due date. Additionally, individual due date calculations may be affected by factors not captured by our calculator, including but not limited to: irregular menstrual cycles, uncertain LMP dates, variations in ovulation timing, differences in embryo development rates, multiple gestations (twins, triplets), and individual biological variations that affect gestational length.

You should not rely solely on the results of our calculator when making medical or life decisions. The estimates provided are approximate and should be used as a starting point for understanding your estimated due date. For an accurate determination of your due date, you must consult with your healthcare provider, who will calculate your due date based on your complete medical history, clinical examination, and ultrasound measurements.

We respect your privacy and have designed our calculator to process your data entirely on your device. When you enter your last menstrual period date, conception date, or IVF transfer date into our calculator, all calculations are performed locally in your web browser using client-side JavaScript. Your personal health information — including dates related to your menstrual cycle, conception, or fertility treatment — is never transmitted to our servers or stored in any database.

This means that if you close your browser or navigate away from our website, the information you entered into the calculator is gone — we do not retain it. We cannot access, view, or reconstruct your calculator inputs at any time. This design choice was made intentionally to protect your privacy and ensure that your sensitive health information remains under your control at all times. We understand that pregnancy and fertility information is deeply personal, and we take your trust seriously.

While calculator inputs are processed entirely on your device, our website does collect certain non-personal information automatically through standard web technologies, including your IP address (anonymized), browser type, device type, pages visited, and time spent on our site. This information is collected through Google Analytics to help us understand how visitors use our website and improve our service. For complete details about data collection practices, please review our Privacy Policy.

PregnancyDueCalculatorByConception.com does not guarantee that the estimated due date provided by our calculator will be accurate for your specific pregnancy. Due dates are estimates, and actual delivery dates depend on many individual factors that cannot be fully captured by an online calculation tool. Your healthcare provider is the only qualified person to determine your official due date.

Using our calculator does not replace a medical evaluation or prenatal care. To receive proper medical guidance about your pregnancy, you must consult with a qualified healthcare provider such as an obstetrician, gynecologist, or certified nurse-midwife. Each pregnancy is unique, and only a medical professional can provide personalized care and an accurate due date assessment based on clinical evaluation and ultrasound dating.

We are not responsible for any decisions you make based on the information provided by our calculator, including but not limited to decisions about when to announce your pregnancy, when to start maternity leave, when to prepare for delivery, or when to seek medical attention. You should always consult with a qualified healthcare provider for personalized medical advice about your pregnancy and due date.

Furthermore, we make no representations or warranties regarding the outcomes of any pregnancy. Pregnancy involves inherent risks and uncertainties, and no online tool can predict or guarantee the course or outcome of any pregnancy. Always follow the guidance of your healthcare team for all medical decisions.

PregnancyDueCalculatorByConception.com is a free service supported by advertising revenue. We display advertisements provided by Google AdSense and other third-party advertising networks on our website. These advertisements help us cover the costs of maintaining, updating, and improving our calculator and website so that we can continue to offer this service at no charge to users.

Third-party advertisements displayed on our website are not endorsed by PregnancyDueCalculatorByConception.com. We do not control the content of these advertisements, and the inclusion of any advertisement on our website does not constitute an endorsement, recommendation, or representation of the advertised product or service. This is especially important to note for health-related advertisements — we do not endorse any specific medical products, supplements, or treatments that may appear in ads on our site. Always consult your healthcare provider before using any health product or service.

Google AdSense and its partners may use cookies, web beacons, and similar technologies to serve advertisements based on your prior visits to our website and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and/or other sites on the Internet. You may opt out of personalized advertising by visiting Google Ads Settings. For more information about how Google uses data, please review Google's advertising policies.

Our website may also contain links to third-party websites, including reputable health organizations such as ACOG, WHO, and the CDC. These links are provided for your convenience and informational purposes only. We do not control the content, privacy policies, or practices of any third-party website and are not responsible for the accuracy, legality, or content of any third-party site. Accessing any third-party link is done entirely at your own risk.

The Service and its original content (excluding user-provided information), features, and functionality are and will remain the exclusive property of PregnancyDueCalculatorByConception.com and its licensors. The Service is protected by copyright, trademark, and other laws of both the United States and foreign countries. This includes our calculator algorithms, user interface design, written content, pregnancy week-by-week information, and the overall presentation and organization of information on our website.

Our trademarks and trade dress may not be used in connection with any product or service without the prior written consent of PregnancyDueCalculatorByConception.com. You are not granted any right or license to use any trademarks, service marks, logos, or other proprietary marks displayed on the Service.

You may not reproduce, distribute, modify, create derivative works of, publicly display, publicly perform, republish, download, store, or transmit any of the material on our Service without our prior written consent, except as follows: (a) your computer may temporarily store copies of such materials in RAM incidental to your accessing and viewing those materials, and (b) you may store files that are automatically cached by your web browser for display enhancement purposes.

Any feedback, comments, or suggestions you provide regarding the Service is entirely voluntary, and we will be free to use such feedback, comments, or suggestions without any obligation to you. By submitting feedback, you grant us a non-exclusive, perpetual, irrevocable, royalty-free, worldwide license to use, reproduce, modify, adapt, publish, translate, distribute, and sublicense such feedback for any purpose.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL PREGNANCYDUECALCULATORBYCONCEPTION.COM, ITS DIRECTORS, EMPLOYEES, PARTNERS, AGENTS, SUPPLIERS, OR AFFILIATES BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING WITHOUT LIMITATION LOSS OF PROFITS, DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES, RESULTING FROM: (A) YOUR ACCESS TO OR USE OF OR INABILITY TO ACCESS OR USE THE SERVICE; (B) ANY CONDUCT OR CONTENT OF ANY THIRD PARTY ON THE SERVICE; (C) ANY CONTENT OBTAINED FROM THE SERVICE; OR (D) UNAUTHORIZED ACCESS, USE, OR ALTERATION OF YOUR TRANSMISSIONS OR CONTENT.

IN NO EVENT SHALL THE TOTAL LIABILITY OF PREGNANCYDUECALCULATORBYCONCEPTION.COM TO YOU FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THE USE OF, OR INABILITY TO USE, THE SERVICE EXCEED THE AMOUNT OF ONE HUNDRED DOLLARS ($100) OR THE AMOUNT YOU PAID TO PREGNANCYDUECALCULATORBYCONCEPTION.COM IN THE PRIOR TWELVE MONTHS, WHICHEVER IS GREATER. SINCE THE SERVICE IS PROVIDED FREE OF CHARGE, THE MAXIMUM LIABILITY SHALL BE LIMITED TO ONE HUNDRED DOLLARS ($100).

The foregoing limitations will apply even if the stated remedy fails of its essential purpose. Some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages, so the above limitation may not apply to you. In such jurisdictions, our liability shall be limited to the maximum extent permitted by law.

You acknowledge that the Service is provided without any warranties of any kind, whether express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the Service will be uninterrupted, timely, secure, or error-free, that the results obtained from the use of the Service will be accurate or reliable, or that the quality of any information or other material obtained through the Service will meet your expectations.

You agree to defend, indemnify, and hold harmless PregnancyDueCalculatorByConception.com and its officers, directors, employees, agents, licensors, and suppliers from and against any claims, actions, demands, liabilities, and settlements including legal fees arising from or related to: (a) your use of the Service; (b) your violation of these Terms; (c) your violation of any applicable law, rule, or regulation; or (d) any claim that your use of the Service caused damage to a third party.

PregnancyDueCalculatorByConception.com reserves the right, at its own expense, to assume the exclusive defense and control of any matter otherwise subject to indemnification by you, and in such case, you agree to cooperate with our defense of such claim. The indemnification obligations under this section shall survive the termination of these Terms and your use of the Service.

We reserve the right to modify or replace these Terms at any time at our sole discretion. If a revision is material, we will provide at least 30 days' notice prior to any new terms taking effect. What constitutes a material change will be determined at our sole discretion. We will notify you of any material changes by posting the new Terms on our website and updating the "Last Updated" date.

We also reserve the right to modify, update, or discontinue the Service (or any part thereof) at any time without notice. We shall not be liable to you or any third party for any modification, price change, suspension, or discontinuance of the Service. We may add new features to the Service from time to time, and such features shall be subject to these Terms.

Your continued use of the Service following the posting of revised Terms means that you accept and agree to the changes. You are expected to check this page periodically so you are aware of any changes, as they are binding on you. If you do not agree with the revised Terms, you must discontinue your use of the Service immediately.

These Terms shall be governed and construed in accordance with the laws of the United States, without regard to its conflict of law provisions. Our failure to enforce any right or provision of these Terms will not be considered a waiver of those rights.

If any provision of these Terms is held to be invalid or unenforceable by a court of competent jurisdiction, the remaining provisions of these Terms will remain in effect. These Terms constitute the entire agreement between us regarding our Service and supersede any prior agreements we might have had between us regarding the Service.

For users accessing the Service from outside the United States, you agree that these Terms are governed by U.S. law, and you consent to the exclusive jurisdiction of the courts located within the United States for the resolution of any disputes. If you are accessing the Service from a jurisdiction that prohibits or restricts the use of online health information services, you are responsible for complying with your local laws.

Any disputes arising out of or relating to these Terms or the Service shall be resolved through binding arbitration in accordance with the rules of the American Arbitration Association. The arbitration shall be conducted in the United States, and the language of the arbitration shall be English.

Before initiating arbitration, you agree to first attempt to resolve any dispute informally by contacting us at [email protected]. We will attempt to resolve the dispute informally within 30 days. If the dispute is not resolved within 30 days, either party may proceed with arbitration.

The arbitrator's decision shall be final and binding, and judgment on the arbitration award may be entered in any court of competent jurisdiction. The arbitrator shall have the authority to grant any remedy or relief that a court of competent jurisdiction could grant, including injunctive relief. The arbitrator shall not have the authority to award punitive damages or any damages not permitted by these Terms.

You agree that any arbitration shall be conducted on an individual basis and not as a class action, collective action, or representative action. You waive any right to participate in a class action lawsuit or class-wide arbitration against PregnancyDueCalculatorByConception.com. This arbitration agreement shall survive the termination of these Terms and your use of the Service.

If any provision of these Terms is held to be unenforceable or invalid, such provision will be changed and interpreted to accomplish its objectives to the greatest extent possible under applicable law, and the remaining provisions will continue in full force and effect. The invalidity of any provision of these Terms shall not affect the validity or enforceability of any other provision.

The section headings in these Terms are for convenience only and have no legal or contractual effect. The word "including" means "including without limitation." Any reference to a statute or regulation includes all rules and regulations promulgated thereunder and any subsequent amendments.

These Terms, together with our Privacy Policy and Disclaimer, constitute the entire agreement between you and PregnancyDueCalculatorByConception.com regarding the use of the Service. They supersede all prior or contemporaneous communications, representations, or agreements, whether oral or written, between you and PregnancyDueCalculatorByConception.com.

No waiver of any term of these Terms shall be deemed a further or continuing waiver of such term or any other term, and any failure of PregnancyDueCalculatorByConception.com to assert a right or provision under these Terms shall not constitute a waiver of such right or provision.

If you have any questions about these Terms of Service, please contact us. We welcome your feedback and will do our best to address your concerns promptly. You can reach us by email or by visiting our contact page.