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Reproduction in Living Organisms

Some clues have multiple possible answers; the correct answer will fit the number of letters in the box. No spaces for any answers.
Across
Reproduction requiring only one parent.
Prevents STIs but not pregnancy.
Provides food to the fetus
Reproduces with cones.
A plant which reproduces through pollination.
Where semen is introduced in the female.
Allows sperm to travel to the urethra.
Male reproductive organ.
Both parents are fertilized and lay eggs.
Connects the ovaries to the uterus.
A sperm and an ova fuse together.
Connects the vagina to the uterus.
Supports the stigma.
Trimester in pregnancy when the fetus' heart beats.
When a sperm and an ova combine.
Liquid which kills sperm on contact.
Fertilization outside the body.
When the wind carries seeds away. One word.
Protects the fetus.
Gland in the brain which releases sex hormones.
Down
A tasty way for angiosperms to protect their seeds.
Part of a seed which provides food to the embryo.
Spreads STIs.
Contains a plant's ovule.
Produces pollen.
Female hormone.
Cycle which lasts 28 days.
STI which shortens the human lifespan if untreated.
Female reproductive organ.
Prevents semen from entering the uterus by being inserted in the vagina.
An organism has male and female reproductive organs.
Male hormone
Part of the menstrual cycle when pregnancy is most likely.
Produces sperm.
This part is sticky to catch pollen.
Incurable STI which results in warts.
Supports the anther.
Prevents zygote from implanting in the uterus.
A time in human development when sex hormones are released.
Prevents pregnancy and STIs.
Denture dams prevent this.