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The fetus is considered full-term at the end of the 39th week of gestational age. It may be 48 to 53 cm (19 to 21 in) in length. The lanugo is gone except on the upper arms and shoulders. Fingernails extend beyond fingertips. Small breast buds are present on both sexes. Head hair is now coarse and thickest.
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 ]
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]
A related application of the principle of double effect is breastfeeding. Breastfeeding greatly suppresses ovulation, but eventually an ovum is released. Luteal phase defect, caused by breastfeeding, makes the uterine lining hostile to implantation and as such may prevent implantation after fertilization. [42]
Breast crawl is the instinctive movement of a newborn mammal toward the nipple of its mother for the purpose of latching on to initiate breastfeeding. [1] In humans, if the newborn is laid on its mother's abdomen, movements commence at 12 to 44 minutes after birth, with spontaneous suckling being achieved roughly 27 to 71 minutes after birth.
Breast development, also known as mammogenesis, is a complex biological process in primates that takes place throughout a female's life.. It occurs across several phases, including prenatal development, puberty, and pregnancy.
Two early 20th century Korean women breastfeeding their babies while working The history and culture of breastfeeding traces the changing social, medical and legal attitudes to breastfeeding, the act of feeding a child breast milk directly from breast to mouth. Breastfeeding may be performed by the infant's mother or by a surrogate, typically called a wet nurse. Ilkhanate prince Ghazan being ...
Human embryonic development or human embryogenesis is the development and formation of the human embryo.It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development.
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