Clinical-Grade Accuracy

Pregnancy Calculator

Gynosakhi's clinical-grade pregnancy calculator is designed for mothers who want to monitor their weekly fetal progress. By entering your Last Menstrual Period (LMP) or conception date, you will unlock a detailed, week-by-week timeline of your pregnancy, personalized to your cycle length.

Select Calculation Method

First Day of Last Period (LMP)

Average Cycle Length (Days)

Awaiting Calculation

Enter your dates and select calculate to unlock clinical metrics, fetal sizes, and milestone calendars.

Pregnancy Week by Week

Deep dive into fetal sizing milestones, symptom guides, scientific nutrition plans, and safety advice tailored to every week.

Browse Weeks Database

W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18 W19 W20 W21 W22 W23 W24 W25 W26 W27 W28 W29 W30 W31 W32 W33 W34 W35 W36 W37 W38 W39 W40 W41 W42

Gynosakhi Premium Features

Track Your Pregnancy Smarter

Gynosakhi provides medical-grade monitoring tools to support you at every phase of motherhood. Synchronize calculations, track body changes, and get real-time warnings.

AI Pregnancy Assistant

Kick Counter

Water & Weight Logs

Doctor Guidance

Gynosakhi Premium ACTIVE

Week 22 126 Days Left

Baby Kick Counter 10 / hour

Prenatal Nutrition Plan 100% Target

BP Monitor: Regular 118/76 mmHg

OB-GYN Certified System

Frequently Asked Questions

How does a pregnancy calculator estimate my pregnancy week?

A pregnancy calculator calculates your current week by taking the first day of your Last Menstrual Period (LMP) and tracking the days elapsed. In medical terms, pregnancy is measured from the LMP, which adds roughly 2 weeks before actual conception occurred.

Is the pregnancy week calculation based on 28-day cycles?

Yes, our engine adjusts calculations dynamically. If your menstrual cycle is longer or shorter than the standard 28 days, it adds or subtracts the difference from your estimated due date (EDD) to ensure clinical precision.

Can my doctor change my calculated pregnancy week?

Yes. Early dating ultrasounds (usually performed between weeks 8 and 14) provide the most accurate measurements of the fetus (Crown-Rump Length) and may adjust your week count or due date by a few days.

OB-GYN Clinical Advisor

Dr. Shruti Gupta, OB-GYN

15+ Years Reproductive Health | Senior Clinical Evaluator

"Our pregnancy engine calculations are based on standard clinical parameters set by leading reproductive medicine bodies, including the American College of Obstetricians and Gynecologists (ACOG). Each algorithm adjusts for variations in cycle lengths to provide accurate clinical insights."

Last Clinical Review: June 2026 | Reviewed for accuracy and compliance

Clinical References & Trust Sources

Our platform calculations align with guidelines published by global obstetric, gynecological, and pediatric entities:

ACOG

ACOG GuidelinesDating scan metrics

WHO

WHO RecommendationsPrenatal nutrition targets

CDC

CDC Pregnancy AdviceMaternal weight gains

NHS

NHS Pregnancy InfoWeekly symptom tracker

Scientific Citations: 1. ACOG Committee Opinion No. 700: Methods for Estimating the Due Date (May 2017).
2. World Health Organization guidelines on antenatal care for a positive pregnancy experience (2016).
3. CDC recommendations on maternal folic acid supplements.