Mostly it is due to breast feeding and is normal. Furthermore Irregular periods may be due to several reasons including stress or some medicines or nutritional supplements. There may be hormonal problems like Hypothyroidism, Hyperprolactinemia, Hyperandrogenism, PCOD, Obesity. For diagnosis you need to do blood tests, some or all of these, Hb TC DC Sugar PP PROLACTIN TSH TESTOSTERONE and Ultrasound of Pelvis or TVS. Depending on the reports treatment is decided. If you are over weight then you need to reduce weight.
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