Hello and welcome to HCM
Once you have started the periods it is not possible to conceive.
Conception only takes place when intercourse takes place during ovulation period.
During menstrual cycles no conception takes place.
Regarding the emergency contraception- Ovral-L tablets, it has to be taken after having unprotected intercourse
Two tablets are to be taken after 120 hours of having unprotected sex and another two after 12 hours.
It is an 'emergency contraception'.
There are other modes of contraception like barrier method which can be used.
If you want along time contraception then Depo-provera
injection is a good option. It is injected in the forearm and is effective for three month period.
Please consult your gynaecologists ofr further details.
Thank you and take care
Dr Shailja P Wahal