Is a make-up fast valid if I had suhoor between the Fajr call to prayer and the iqamah, knowing that I am pregnant and was unaware of the time of the adhan?

You must abstain from food and drink starting from the true dawn (Fajr Sadiq), upon hearing the Adhan (definition), if the muezzin is precise with his timing. If one eats after the Adhan, their fast is invalid. Eating Suhoor (definition) after the Adhan due to ignorance of the time or fear for the fetus has no bearing on the ruling. The Permanent Committee for Issuing Fatwas stated that one must make up the days in which they ate after the Fajr Adhan out of ignorance, because they ate and drank during the daytime of Ramadan (definition).