The combined oral contraceptive pill is often just called "the pill". It contains artificial versions of female hormones oestrogen and progesterone, which are produced naturally in the ovaries. If sperm reaches an egg (ovum), pregnancy can happen.
The oral contraceptive pills contains synthetic estrogen and Progesterone which are not harmful to the baby however we counsel that these drugs should be discontinued as soon as the woman discovers she is pregnant.
Currently, in the United States of America, the national television news broadcasts are reporting that women who are taking birth control pills are suffering from side effects when they receive vaccinations for the novel COVID-19-SARS-CoV-2 corona virus. This finding is consistent with the recommendations given to the public to check with their doctors before being vaccinated if they are taking any prescription medications.
There is a brief item on the internet from five years ago that indicates that the risk for an ectopic pregnancy is increased for women who take oral contraceptives during pregnancy, as follows:
"If you test positive, you should stop taking your birth control pill. Becoming pregnant while on birth control does increase your risk of ectopic pregnancy. An ectopic pregnancy occurs when a fertilized embryo attaches outside the uterus, often in the fallopian tube. Feb 2, 2016 "