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During a pregnancy, the term for the developing cells of an organism until around eight-nine weeks after an ovum was fertilized. After this time, the organism would then be called a fetus.
A long tube that carries sperm from each epididymis to the seminal vesicles during ejaculation.
STIs: illness, infection and/or disease which is often or can be transmitted through sexual or other intimate contact, like HIV, Chlamydia or Herpes. Some people call STIs STDs.