Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
Solar and lunar eclipses do not effect a pregnant woman or her fetus, as there is no confirmation in the Book (of Allah) or the Sunnah (of the Prophet (Sallallahu Alaihi wa Sallam) about this impact.
You have to know – may Allah bless you – that the Prophet (Sallallahu Alaihi wa Sallam) said: "The Sun and the moon are indeed two signs (evidences, proofs…) of the signs of Allah. And the lunar or solar eclipse do not happen because of the death or the life of any person." In another narration the following is added: "He frightens His slaves with them (the Solar and Lunar eclipses)."
The Prophet (Sallallahu Alaihi wa Sallam) said this in response to those who claimed that the Solar eclipse occurred due to the death of Ibrahim, the son of the Prophet (Sallallahu Alaihi wa Sallam).
Therefore, one should not believe that solar or lunar eclipses have any impact or effect on what occurs on earth, except if it is scientifically proven that the rays of the Sun have a particular effect on human beings at that particular time; in that case it can be taken into consideration.
Allah knows best.