Natural fertility and its changes with ageing. Crossword

This printable crossword puzzle on the topic of Human Body Systems has 12 clues. Answers range from 3 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

If someone is trying to avoid conceiving naturally what do they use?
What is the period of time 6 days before a ovulation called?
What stimulant drink should you avoid when trying to conceive?
Which depressant drink should you avoid drinking in large quantities when trying to conceive?
What time of the menstrual cycle is a woman most liking to get pregnant?
Some lubricants can reduce sperm _______.
At what age does male fertility begin to decline?
Natural fertility in men decreases with age because sperm ______ decreases.
At what age does female fertility begin to decline?
What is it called when women are no longer able to get pregnant naturally?
Eggs are a __________ source?
As you age what in a women's egg begins to degrade?