Overview
The first month of pregnancy begins before you are actually pregnant. Weeks 1 and 2 cover your period and ovulation; conception happens around the end of week 2, and implantation follows in week 3. Most women only discover they are pregnant at the end of this month, when a period is missed.
Your baby this month
By the end of month 1 the fertilised egg has become a tiny embryo about 1 mm across, nestled in the uterine lining. Its cells are organising into the three layers that will form every organ, and the early placenta has started making hCG.
Your body this month
There may be no signs at all. Some women notice light spotting at implantation, mild cramps, breast tenderness or unusual tiredness towards the end of the month.
Check-ups & tests
- Take a home pregnancy test from the day your period is due
- Book a first visit with a gynaecologist or government health centre
- Start or continue folic acid 400 micrograms daily
Nutrition this month
- Folate-rich foods: green leafy vegetables, citrus fruits, beans and fortified cereals
- Iodised salt for the baby’s brain and thyroid development
- Limit caffeine to about 200 mg a day (roughly two cups of tea or one cup of coffee)
Tips for month 1
- Stop alcohol, smoking and tobacco (including gutkha and pan masala)
- Tell any doctor, dentist or pharmacist that you may be pregnant
- Calculate your due date
Weeks in month 1
FAQs
How many weeks is 1 month pregnant?
Month 1 of pregnancy covers roughly weeks 1 to 4. Because calendar months are longer than four weeks, different charts place the boundaries slightly differently.
Which trimester is month 1?
Month 1 is in the first trimester.
What should I avoid in month 1 of pregnancy?
Avoid alcohol, smoking, tobacco, unprescribed medicines, raw or undercooked meat and eggs, unpasteurised milk products and excessive caffeine throughout pregnancy. Ask your doctor about any specific restrictions for you.
Medical disclaimer: The results and information on this page are estimates for general education only. They are not a diagnosis and do not replace advice from your gynaecologist, obstetrician or midwife. If you have pain, bleeding, reduced baby movements or feel unwell, contact your doctor or call 108 immediately. Read the full disclaimer.