Our Helplines
1-877-327-4636 Alcohol and Substance
1-800-436-8477 Morning Sickness
1-888-246-5840 HIV and HIV Treatment
1-877-439-2744 Motherisk Helpline
416-813-6780 Motherisk Helpline
Pregnancy & Breastfeeding Resources
Current Studies at Motherisk
-
Study seeks women between 4 and 12 weeks in their pregnancy with morning sickness (NVP)
-
Pregnancy in Women with Multiple Sclerosis
-
Environmental Exposures and Children's Health
-
Alcohol Use during Pregnancy
-
Control of Hypertension in Pregnancy Study
-
Folic Acid Before and During Pregnancy
-
Lamisil in Pregnancy
-
Meridia in Pregnancy
-
Autoimmune Diseases in Pregnancy Project
The Motherisk Nausea and Vomiting of Pregnancy (NVP) Forum
Motherisk receives questions from around the world about morning sickness symptoms, effects, treatments and ways to cope. Those questions and answers are posted here for anyone to read, provided the reader acknowledges and accepts the proviso and disclaimer below.
NVP Symptoms and Effects
Date: 2001-12-21
Question:
How do you calculate to get your due date?
Answer:
Start with the first day of your last menstual cycle, and count 40 weeks from that date. If your cycles are regular, this should give you a good indication of your due date. If you are still in doubt, talk to your doctor. Ultrasound will also confirm your due date.












![Validate my RSS feed [Valid RSS]](/images/rssValid.png)