Irregular menstrual periods can indicate hormonal dysfunction and lower egg count in women, even during perimenopause.

“you certainly will have cycle changes and we consider that the per menopausal period where you're starting to really start seeing a spacing out of your period per so they're no longer coming at that perfect ovulatory pattern when you get into the low ovarian reserve but you're still ovulating regularly they first shorten as we said earlier but then when they start lengthening or you start skipping months that's a real big clue that that things are not going in the right direction”