Hello and welcome to HCM,
Withdrawal method of contraception
is not 100 % effective.
The prostatic secretion secreted before actual ejaculation also contains sperms.
So, there is a substantial risk of conception with this method of contraception.Pregnancy
is the most common cause of amenorrhea
A pregnancy test is required to rule out or confirm pregnancy.
You can undertake the urine pregnancy test.
Thanks and take care
Dr Shailja P Wahal