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tako1
On day one the levels of oestrogen and progesterone are low, having dropped quickly at the end of the last cycle. Low oestrogen level causes FSH release from the pituitary gland.

What happens on day 1-4 of the menstrual cycle for the unfertilized egg in the ovary is the discarding of this unused egg, generating menstruation.

What happens when the egg is not fertilized?

LH production drops dramatically, the corpus luteum decreases and, consequently, estrogen and progesterone levels as well. This causes the endometrium to slough off, causing menstruation.

With this information, we can conclude that what happens on day 1-4 of the menstrual cycle for the unfertilized egg in the ovary is the discarding of this unused egg, generating menstruation.

Learn more about menstruation in brainly.com/question/9864045

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