define 1 placenta 2 gestation 3 implantation 4 lactation
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Answer:Placenta- part of the ovary wall to which ovules are attached.
gestation-Gestation is the period of development during the carrying of an embryo, fetus.
implantation - In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus
lactation- Lactation describes the secretion of milk from the mammary glands and the period of time that a mother lactates to feed her young.
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