progesterone | | The type of chemical that controls the menstrual cycle. (7) |
ovaries | | This hormone maintains the thickness of the lining of the uterus ready for a fertilised egg. (12) |
pregnancy | | The technical name for the lining of the uterus. (11) |
oestrogen | | A more common name for menstruation. (6) |
uterus | | The menstrual cycle occurs from puberty until the _________ . (9) |
menstrual | | This results when a fertilised egg implants and develops in the uterus. (9) |
hormone | | How the lining of the uterus leaves the body when it is not needed. (12) |
menopause | | This happens to the lining of the uterus if no fertilised egg is implanted. (9) |
fertilised | | The hormone that causes an egg to mature in the ovary. (9) |
twentyeight | | The approximate number of days the menstrual cycle lasts. (11) |
period | | The sort of egg that would be implanted in the lining of the uterus. (10) |
endometrium | | Where a fertilised egg would be implanted. (6) |
breakdown | | The cycle in which the lining of the uterus builds up and breaks down. (9) |
menstruation | | These produce the hormones oestrogen and progesterone. (7) |