Whether or not FSH and LH are low enough to prepare for pregnancy mainly depends on whether or not they affect ovarian follicular development and ovulation after they have been lowered to a certain degree.
If FSH and LH are low but do not affect follicular development and ovulation, it is possible to prepare for pregnancy normally, if the low level has already affected follicular development, then you need to put off preparing for pregnancy and carry out treatment first.
Low FSH and LH are generally caused by abnormalities in the hypothalamic-pituitary-ovarian function, and are mostly related to factors such as environmental tension, excessive stress, late nights, and poor lifestyle.
Mildly lowered FSH and LH levels do not affect follicular development and ovulation, and can be used to prepare for pregnancy. After adjusting lifestyle, ovarian function can be fully restored, and does not affect fertility.
Severe decrease in FSH and LH levels is due to severe suppression of ovarian function, which often affects ovarian follicular development and ovulation function, and is often accompanied by anovulation, so even if the preparation for conception is not helpful, and it is necessary to treat and adjust the ovarian function before preparation for conception, in order to be able to conceive.