四、胎生 Viviparity a The bearing of live young(i.e. post-egg hatching ) by the female 1、卵胎生 Ovoviviparity 卵保留在母体内孵化,随后胎生出来 家蝇、棉蚜 2、腺营养胎生 denotrophic viviparity Eggs develop within the female uterus, nourished by special milk glands until the larvae mature. 9F 在母体孵化后并不立即出生,取食“子宫” 腺的分泌物,产出时已是老熟幼虫 ■双翅目的蛹蝇组四、胎生Viviparity ◼ The bearing of live young ( i.e. post-egg hatching ) by the female. ◼ 1、卵胎生Ovoviviparity ◼ 卵保留在母体内孵化，随后胎生出来。 ◼ 家蝇、棉蚜 ◼ 2、腺营养胎生Adenotrophic viviparity ◼ Eggs develop within the female uterus, nourished by special milk glands until the larvae mature. 卵 在母体孵化后并不立即出生，取食“子宫” 腺的分泌物，产出时已是老熟幼虫 ◼ 双翅目的蛹蝇组