The Thunder - 13:8
Allah knows what every female bears and what the wombs decrease and increase. With Him everything is according to a measure.
He knows what is in the wombs:
The Family Of Imran/3:6
It is He who formed you in the wombs as He willed. There is no god but He; He is the Exalted, the Wise.
The Family Of Imran/3:36
"When she gave birth to her, she said: "My Lord, I have given birth to a girl."Allah knew what she would give birth to. I have named her Maryam, and I beseech you to protect her and her progeny from Satan, the exorcist."
The Pilgrimage/22:5
O mankind, if you doubt about the resurrection, (remember) We created you from dust, then from a drop, then from a suspended matter (embryo), then from an offspring whose form is definite and uncertain. Thus do We inform you. And whatever We will, We keep it in the wombs for a certain term. Then We bring you forth as a baby, and then you grow to maturity. Some of you will be terminated, and some of you will be brought to the worst age. So that he may not know anything after he has knowledge. You see the earth dry and dead, but when We rain water on it, it vibrates and swells and produces beautiful plants.
Luqman/31:34
With Allah is the knowledge of the Hour (the last hour of the world). He sends down the rain and knows what is in the wombs. No one knows what will happen to him tomorrow, nor does anyone know where he will die. Allah is All-Knowing, All-Knowing.