(2) The function of fallopian tube is to transport eggs. The process that sperm and eggs combine in fallopian tube to form fertilized eggs is called fertilization.
(3) Vagina is the channel through which sperm enter women and babies are born. The process that the fetus develops in the mother's womb for about 280 days and then gives birth through the mother's vagina is called delivery.
(4) 1 ovary can produce eggs and secrete estrogen, which is the main reproductive organ of women;
So the answer is: (1) ovary; Fallopian tube; Uterus; vagina
(2) fertilized eggs; be fertilized
(3)3; Uterus; 4; vagina
(4) egg cells; estrogen