I am 23 regular periods till noe 13 days late. lost lot of weight . could my hormone level be low just started prenatals. husband and i been ttc ?

Several choices: You could be pregnant. You could have lack of ovulation related to your weight gain with delayed period because of that. You could have some hormone abnormalities. Check a pregnancy test. If it's negative, you may want to be seen.

May be related: to weight loss. Reasons for missed / late period include: anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; Over-exercising (endurance athletics), stress, travel, significant illnesses, oral contraceptives & other meds, Illegal drug use, breast feeding, hormone imbalances and medical problems (i.e., PCOS). Pregnancy is #1 reason. Prenatals don't stop period.