Cross a curly hair female with a wavy haired male, what are the chances of having a straight hair child

It’s not likely, unless both are white. Then the child is more likely too.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.