Respuesta :
The fetus can also kick, blink, and grasp. By the second trimester, all structures and body organs have been formed, but are not fully functional, like the kidneys and lungs. The kidneys are the organs that help to filter blood.
How many trimesters are there?
Pregnancy has three trimesters, each of which is marked by specific fetal developments. A pregnancy is considered full-term at 40 weeks.
In humans, an unborn baby which develops and grows inside the uterus (womb). The fetal period begins 8 weeks after fertilization of an egg by a sperm and ends at the time of birth.
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