1st Trimester, Zygote implants into the uterus, Heart and nervous system form, Placenta forms to pass nutrients, Umbilical cord develops and is used for waste, Amniotic sac develops around baby for protection, Third Trimester, Fetus head moves towards vagina, Lungs develop, Opens and closes eyes, 2nd Trimester, Sex is evident, Taste buds develop, Fetus can dream, Most babies can suck their thumb

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