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An embryo is the term for the developing offspring during the first seven weeks following implantation (i.e. ten weeks' gestational age), after which the term fetus is used until birth. [ 5 ] Signs and symptoms of early pregnancy may include missed periods , tender breasts, morning sickness (nausea and vomiting), hunger, implantation bleeding ...
[2] Rubella infection in pregnancy can result in various outcomes ranging from asymptomatic infection to congenital defects to miscarriage and fetal death. [3] [4] If infection occurs 0–11 weeks after conception, the infant has a 90% risk of being affected. [1] If the infection occurs 12–20 weeks after conception, the risk is 20%.
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. In biological terms, the development of the human body entails growth from a one-celled ...
According to Gaither, other symptoms will often kick into gear about three to four weeks after conception. These include a heightened sense of smell, breast tenderness, vaginal discharge ...
Implantation (embryology) Implantation, also known as nidation, [1] is the stage in the mammalian embryonic development in which the blastocyst hatches, attaches, adheres, and invades into the endometrium of the female's uterus. [2] Implantation is the first stage of gestation, and, when successful, the female is considered to be pregnant. [3]
Researchers followed a 38-year-old woman three weeks before conception, and two years postpartum, tracking the changes to her brain via a series of 26 MRI scans.
A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin in a person’s body. The body doesn’t produce that hormone until several days after conception.
In human pregnancy, prenatal development is also called antenatal development. The development of the human embryo follows fertilization, and continues as fetal development. By the end of the tenth week of gestational age, the embryo has acquired its basic form and is referred to as a fetus. The next period is that of fetal development where ...
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