Hi, thanks for using healthcare magic
During adolescence the periods are usually irregular but may eventually normalise.
Reasons for irregular periods
include: stress either physical or emotional, poor nutritional status, abnormal levels of thyroid hormones, abnormal levels of a hormone called prolactin which is released in the brain, PCOS which stands for polycystic ovarian syndrome-consists of irregular periods, infertility
, insulin resistance
, polycystic ovaries
, evidence of elevated levels of male hormones (acne,abnormal hair growth).
If the period comes regularly now, then conception would be more likely to occur.
I hope this helps,