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Gestational age. In obstetrics, gestational age is a measure of the age of a pregnancy taken from the beginning of the woman's last menstrual period (LMP), [1] or the corresponding age of the gestation as estimated by a more accurate method, if available. Such methods include adding 14 days to a known duration since fertilization (as is ...
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. Trophoblast cells surrounding the embryonic cells proliferate and invade deeper into the uterine lining. They will eventually form the placenta and embryonic membranes.
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 red (left) is the female Venus symbol. The blue (right) represents the male Mars symbol. Gender includes the social, psychological, cultural and behavioral aspects of being a man, woman, or other gender identity. [1][2] Depending on the context, this may include sex -based social constructs (i.e. gender roles) as well as gender expression ...
e. The gender binary (also known as gender binarism) [1][2][3] is the classification of gender into two distinct forms of masculine and feminine, whether by social system, cultural belief, or both simultaneously. [A] Most cultures use a gender binary, having two genders (boys / men and girls / women). [4][5][6] In this binary model, gender and ...
One-sex and two-sex theories. The one-sex and two-sex theories are two models of human anatomy or fetal development discussed in Thomas Laqueur 's book Making Sex: Body and Gender from the Greeks to Freud. Laqueur theorizes that a fundamental change in attitudes toward human sexual anatomy occurred in Europe in the 18th and 19th centuries.
Sexual orientation. The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the individual. Prenatal hormones may be seen as the primary determinant of adult sexual orientation, or a co-factor.
The human Y chromosome showing the SRY gene which codes for a protein regulating sexual differentiation. Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. [1]