Brief Answer:
Can be due to many causes.

Detailed Answer:

Hello,

Thanks for posting your query.

The absence of periods that you have can be due to pregnancy.
The other reasons of delayed periods may be hormonal imbalance, emotional upset, anxiety, stress, or other medical conditions that affect the ovaries, uterus, hypothalamus, or pituitary gland. Hypothyroidism, post pill amenorrhea, polycystic ovarian syndrome or less frequently a pituitary tumor causing high prolactin levels or a hypothalamic disease are other causes.
Please visit your gynecologist to undergo physical check up and also to undergo relevant investigations required in your case to find out the cause so that treatment can be given accordingly.

I hope this answers your query.

Wishing you good health.

Regards,
Dr. Rakhi Tayal, OBGYN

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