Once you're pregnant, doctors consider the first day of your last period to be the start of your 40-week pregnancy. So what are the pregnancy symptoms in week 1? The answer may surprise you.

At week one, the baby’s sex is already decided and other organs are fast developing. So, here is a list of the most common symptoms and signs of pregnancy at one week.

Some people can feel pregnancy symptoms start as early as one week after a missed period, says Amy Wetter, MD, board-certified ob-gyn at Pediatrix Medical Group.

From nausea to cramping, explore what pregnancy signs and symptoms you may experience in week 1, according to experts. Here's what you need to know.

If you're trying to get pregnant, you might be wondering how early those first pregnancy symptoms appear. We turned to experts to learn more.

Pregnancy Symptoms Week 1 It's a bit of a mind-bender, but you aren't actually pregnant during what doctors call "week one" of pregnancy. Instead, week one starts on the first day of your last ...

Breast symptoms during pregnancy begin 1–2 weeks after conception and may persist until childbirth. Fatigue. The hormone progesterone contributes to tiredness and fatigue before a period.

Pregnancy Symptoms Week 1. It's a bit of a mind-bender, but you aren't actually pregnant during what doctors call "week one" of pregnancy. Instead, week one starts on the first day of your last ...