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This process is called differentiation, which produces the varied cell types (such as blood cells, kidney cells, and nerve cells). A spontaneous abortion, or miscarriage, in the first trimester of pregnancy is usually [8] due to major genetic mistakes or abnormalities in the developing embryo. During this critical period the developing embryo ...
The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days. [1] During this stage, the zygote divides in a process called cleavage.
The process begins with fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. The resulting zygote develops through mitosis and cell differentiation , and the resulting embryo then implants in the uterus , where the embryo continues development through a fetal stage until birth .
Implantation is the first stage of gestation, and, when successful, the female is considered to be pregnant. [3] An implanted embryo is detected by the presence of increased levels of human chorionic gonadotropin (hCG) in a pregnancy test. [3] The implanted embryo will receive oxygen and nutrients in order to grow.
Now, consider how rare it is for a fetus to wrap itself around another fetus and carry on growing. A 2008 case study recounts an unfortunate infant born with 11 partially-formed fetuses throughout ...
Pregnancy usually occurs by sexual intercourse, but can also occur through assisted reproductive technology procedures. [6] A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a stillbirth. Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP), a span known as the gestational age.
An ectopic pregnancy happens when a fertilized egg grows outside the uterus, and abdominal pregnancies, like this one, are extremely rare. Woman's ER visit for stomach pain reveals a baby growing ...
Related: Surrogate Pregnant with Baby No. 11: 'I’m Probably the Unicorn’ Mia and Pierre took a month to do research and feel firm in their decision. But with an overwhelming amount to consider ...
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