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OCR Biology GCSE B456, 16/06/17

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also how did everyone do in the 6 mark about the menstrual cycle?

Meh

I basically described the first graph and then the second graph and then I wrote why the second graph was like that

I think I wrote

Graph A- as FSH increased, oestrogen levels increased which inhibited FSH production so caused it to fall. The oestrogen increased the level of LH which in turn inhibited the production of oestrogen. The LH increasing caused eventually the level of progesterone to increase, since progesterone inhibits LH the LH levels fell.

Graph B - Similarly, as oestrogen levels increased FSH production fell. However in contrast in graph B the level of LH did not increase as oestrogen levels did. This was because contraceptives involve taking oestrogen to keep the level of it permanently high- this mimics pregnancy and therefore limits egg development and production. I also said progesterone levels increased but didn't say why that was relevant.