Surprise: during "week 1" of pregnancy, you are not actually pregnant yet. Pregnancy is dated from the first day of your last menstrual period (LMP), which means weeks 1 and 2 are counted before conception even happens. This is the standard dating method used by doctors worldwide.
Your Baby This Week
There is no baby yet. Your body is shedding the uterine lining from the previous cycle and preparing to release a new egg. Ovulation typically happens around day 14 of a 28-day cycle, so conception is still about two weeks away.
Your Body
Right now, your body is going through a normal menstrual period. Hormones like follicle-stimulating hormone (FSH) are already at work, signaling your ovaries to begin maturing a new egg. Estrogen levels will rise steadily over the coming days.
You may experience your usual period symptoms: cramping, bloating, fatigue, or mood changes. Nothing feels different from any other cycle, and that is completely normal.
What to Do This Week
- Start taking folic acid if you have not already. The recommended dose is 400 micrograms daily. Folic acid reduces the risk of neural tube defects by up to 70% when taken before conception (ACOG, 2023).
- Track your cycle. Knowing your cycle length helps predict ovulation. Apps, basal body temperature, or ovulation predictor kits can all help.
- Review your medications with your doctor. Some prescriptions need adjustment before pregnancy.
Common Questions
Why does pregnancy start before conception?
Doctors count from the first day of your last period because most people know that date, while the exact day of conception is harder to pinpoint. This means you are technically "pregnant" for two weeks before the egg is even fertilized.
Should I stop drinking alcohol now?
If you are actively trying to conceive, it is a good idea to stop or limit alcohol. The earliest weeks of embryo development are critical, and many people do not realize they are pregnant right away.