Gestation - Wikipedia
网页Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). [1] . It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations at the same time, for example in a multiple birth. [2]
Gestation | Pregnancy, Development & Duration | Britannica
网页gestation, in mammals, the time between conception and birth, during which the embryo or fetus is developing in the uterus. This definition raises occasional difficulties because in some species (e.g., monkeys and man) the exact time of conception may not be known.
Gestation: What It Means in Pregnancy - Healthline
网页2023年7月11日 · What is gestation? Gestation is defined as the time between conception and birth. Though we’re focusing on human gestation, this term applies more broadly to all mammals. A fetus grows...
Gestation Definition & Meaning - Merriam-Webster
网页1. : the carrying of young in the uterus (see uterus sense 1) : pregnancy. 2. : conception (see conception sense 3) and development especially in the mind. gestational. je-ˈstā-sh (ə …
Pregnancy: Gestation, Trimesters & What To Expect - Cleveland Clinic
网页2024年4月11日 · What is pregnancy? Pregnancy refers to a time when you have a fetus (or more than one) developing in your uterus. It most often happens after sexual intercourse, but it can also happen through assisted reproductive technologies (ARTs).
Gestational age | Definition & Stages | Britannica
网页By the gestational age of weeks 9 to 13, the genitalia have formed, and the entire fetus weighs about 1 oz (0.06 pounds). By weeks 21 to 23, the fetus’s eyes have developed, and the fetal heartbeat can be heard by stethoscope. By 40 weeks, fetal development is …
5.6 Human Pregnancy and Birth – Human Biology - Open …
网页Pregnancy begins with the fertilization of an egg and continues through to the birth of the individual. The length of time of gestation varies among animals, but is very similar among the great apes: human gestation is 266 days, while chimpanzee gestation is 237 days, a gorilla’s is 257 days, and orangutan gestation is 260 days long.
gestation - Kids | Britannica Kids | Homework Help
网页Gestation is the period of time that a mammal carries her offspring, or babies, inside her body before giving birth. The length of gestation is different for each type of mammal. Larger animals usually have longer gestations than smaller animals. Human gestation, or pregnancy, lasts about nine months. An elephant’s gestation lasts about 22 months.
43.7A: Human Gestation - Biology LibreTexts
网页2023年10月31日 · By five weeks, limb buds, eyes, the heart, and liver have been basically formed. By eight weeks, the term fetus applies; the body is essentially formed. The individual is about five centimeters (two inches) in length and many of the organs, such as the lungs and liver, are not yet functioning.
Gestation - SpringerLink
网页2020年10月20日 · Gestation is the period of time during which the fetus develops in the uterus of a woman. It begins with conception and ends with birth. The word originates from the Latin verb gestare, meaning to bear.
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