Pregnancy Week
Calculating gestational week and trimester from your last menstrual period is a foundation of antenatal care. Naegele's rule estimates the due date as 280 days after the first day of your last menstrual period (LMP). The HekimDoktor pregnancy calculator tells you how many weeks along you are today, your current trimester, and your estimated due date. Saving the result to your profile unlocks weekly development tracking, appointment reminders, and tailored nutrition guidance.
Why HekimDoktor?
- ✓Naegele's rule with cycle-length adjustment
- ✓Result writes to User.pregnancyDueDate
- ✓Automatically opens the pregnancy timeline module (weekly updates)
Frequently Asked Questions
How accurate is Naegele's rule?
An average variance of 5–7 days is normal in first pregnancies. The margin grows for cycles longer or shorter than 28 days; the HekimDoktor calculator factors in cycle length. For a precise date, an ultrasound at 6–12 weeks is the gold standard.
How are the trimesters divided?
1st trimester: weeks 0–13 (the critical organogenesis window). 2nd trimester: weeks 14–26 (typically the most comfortable period). 3rd trimester: weeks 27–40 (preparation for birth).
My calculation differs from my doctor's — which is right?
Ultrasound dating takes precedence, particularly for women with irregular cycles or who do not remember their LMP exactly. Use HekimDoktor for calendar tracking, but defer medical decisions to your doctor.
What does the pregnancy tracking module include?
Week-by-week baby size (with familiar visual references like an egg, a strawberry, a melon), maternal symptoms, medical appointment reminders, weight tracking, nutrition guidance, and the childhood vaccination schedule.