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Gestational age is contrasted with fertilization age, which takes the date of fertilization as the start date of gestation. There are different approaches to defining the start of a pregnancy. This definition is unusual in that it describes women as becoming "pregnant" about two weeks before they even had sex.
The 1965 ACOG definition was imprecise because, by the time it implants, the embryo is called a blastocyst, [26] so it was clarified in 1972 to "Conception is the implantation of the blastocyst." [27] Some dictionaries continue to use the definition of conception as the formation of a viable zygote. [28]
Pre-conception counseling is care that is provided to a woman or couple to discuss conception, pregnancy, current health issues and recommendations for the period before pregnancy. [87] Prenatal medical care is the medical and nursing care recommended for women during pregnancy, time intervals and exact goals of each visit differ by country. [88]
The Immaculate Conception is the belief that the Virgin Mary was free of original sin from the moment of her conception. [1] It is one of the four Marian dogmas of the Catholic Church. [ 2 ] Debated by medieval theologians, it was not defined as a dogma until 1854, [ 3 ] by Pope Pius IX in the papal bull Ineffabilis Deus . [ 4 ]
Gestational age: 3 weeks and 0 days until 3 weeks and 6 days old. 22–28 days from last menstruation. Embryonic age: Week nr 2. 1 week old. 8–14 days from fertilization.
The estimated date of delivery (EDD), also known as expected date of confinement, [1] and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. [2] Normal pregnancies last between 38 and 42 weeks. [3] Children are delivered on their expected due date about 4% of the time. [4]
Drawing of a fetus in utero. 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]
The term "conception" refers variably to either fertilization or to formation of the conceptus after its implantation in the uterus, and this terminology is controversial. The zygote will develop into a male if the egg is fertilized by a sperm that carries a Y chromosome, or a female if the sperm carries an X chromosome. [5]
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