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.

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.

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.

2022年6月3日 · Fetal development typically follows a predictable course. Find out what happens during the first trimester by checking out this weekly calendar of events. Keep in mind that measurements are approximate. It might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy. Yes, you read that correctly!

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.

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...

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

2024年7月8日 · Gestational age or the length of time a person is pregnant is the main difference between an embryo and a fetus. This article will explain more about an embryo and a fetus. What Is an Embryo? An embryo is the early stage of a baby’s development during pregnancy. The first stage is the fertilized egg (zygote).

2021年8月25日 · When egg and sperm meet, a zygote is formed and quickly begins dividing to become an embryo. As pregnancy progresses, the embryo becomes a fetus. The fetus becomes a neonate or newborn at birth.

2023年10月3日 · During pregnancy, the fertilized egg grows and develops into a fetus, a process that typically takes around nine months in humans. Medically, the exact growing stage at which we recognize a fetus is the 9th week after fertilization or the 11th week of pregnancy/gestation.