Hello
Thanks for writing to us with your health concern.
Apart from a
pregnancy there are various other factors that can cause menstrual delay.
Stress, anxiety, tensions, weight gain, ingestion of
hormonal medications ( such as the
emergency contraceptive pill ECP ), travelling, late nights etc are some reasons.
Alteration in
thyroid hormone dysfunction and PCOS -
polycystic ovarian syndrome also can cause such a picture.
In this case, unwanted 72 offers almost more than 90 % protection against pregnancy.
So your friend is reasonably well protected.
However, the ECP has a side effect of preponing or postponing the expected normal periods by seven days or more, sometimes a week.
Hence the menstrual delay most probably would be caused by the intake of the ECP.
Right now , just wait and watch
If she does not have a proper period within the next two weeks, please take a pregnancy test.
All the best.
Take care.