If he had a vasectomy, no.
Pregnancy is a known risk whenever a woman has sex. There is no birth control method, including vasectomy and tubal ligation, that is 100% effective. If a woman gets pregnant with an IUD, she and her partner are responsible.
Fertility returns to your baseline after removal of the IUD. Whether it's easy to get pregnant after removal depends on your fertility, not the IUD.
and your question is?
If the vasectomy was successful then no the woman cannot become pregnant.
A vasectomy prevents a male making a female pregnant. It does not prevent a female getting pregnant since she could get pregnant with a male who has not had a vasectomy or by artificial insemination.
The doctor can't see if you are pregnant while inserting an IUD. Your health care provider will ask questions and probably do a urine pregnancy test to make sure that you are not getting an IUD when you are already pregnant.
You should not be able to get pregnant by a man who has had a vasectomy.
Pregnancy on the IUD is unusual. Bleeding with the IUD is not a special sign of pregnancy. If you think you might be pregnant, take a pregnancy test.
No you can not be.
No
You should remove your IUD if you want to get pregnant, if you are pregnant, or if its useful life is expired and it's time to replace it.
There is no special risk from getting pregnant right after you stop using the IUD.