A fetus or foetus (/ ˈ f iː t ə s /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn mammalian offspring that develops from an embryo. [1] Following the embryonic stage , the fetal stage of development takes place.

FOETUS definition: 1. a young human being or animal before birth, after the organs have started to develop: 2. a UK…. Learn more.

2023年2月21日 · Follow your baby's development week by week, from conception to labor, in these amazingly detailed, doctor-reviewed images. At the start of this week, you ovulate. Your egg is fertilized 12 to 24 hours later if a sperm penetrates it.

2017年7月6日 · Fetal development occurs between the embryonic stage of development and birth in humans. This stage begins after 11 weeks of gestation, when the embryo begins to exhibit human characteristics, and lasts until birth.

2025年3月18日 · As your pregnancy goes on, you may wonder how your baby is growing and developing. Use this information to follow along with what's happening week by week during the first 12 weeks of pregnancy, called the first trimester. It might seem odd, but you're actually not pregnant the first week or two of what's counted as your pregnancy's 40 weeks.

2024年3月19日 · There are three stages of fetal development: germinal, embryonic and fetal. Most people don’t talk about their pregnancy in these terms, but it can be helpful to know. The germinal stage is the shortest stage of fetal development. It begins at conception when a sperm and egg join in your fallopian tube.

2023年4月12日 · In human pregnancies, a baby-to-be isn’t considered a fetus until the 9th week after conception, or week 11 after your last menstrual period (LMP). The embryonic period is all about the formation...