when i was pregnant i had the same query. i a spoke to my gynecologist, she said its better to avoid sex for first 3 months of pregnancy
as there are few chances of abortion
. And to avoid sex in last 3 months of pregnancy as you can have bleeding and early labor. so as per doctor advice
its better to have sex after 3 months and not to have sex after 6 months. but some amount of discomfort will be there, actually me and my husband trIed to have sex after 3 months, i was more at a discomfort level. my lovely husband said we will not have sex, as its causing discomfort to yu.