Hi, welcome to healthcare magic
Once the contraceptive
is discontinued then the possibility of getting pregnant exists. Some couples try immediately after stopping the pill, which is fine. Others may prefer to wait till the next period comes which would allow for easier dating of the baby ( normally when estimating the fetal age doctors will ask when was the first day of the last period).
The last option is not as important now because an ultrasound
can be done to assess fetal age.
In some women it can take a few months for their menstrual cycle to settle down , while it may occur faster in others so the time to get pregnant can be from 1 month to longer .
The previous use of yasmin
should not impact on the health of the baby.
I hope this information is helpful to you and I wish you and your wife every success