Go through the following statement:-
(i) In both pre-pubertal and post-meno-pausal females, there are low levels of female sex hormones and high levels of gonadotrophins.
(ii) There is no bleeding in an oestrous cycle as the broken endometrium is absorbed.
(iii) Oestrogen is mainly secreted by the granulosa cells and progesterone mainly by the theca cells
(iv) Some of the menopausal symptoms can be reversed HRT wherein a small sode of gonadotrophins is given to the patient.
Which of these are correct?