If a pregnant woman breathes in a carbon monoxide?

If the people breathe in much carbon monoxide, they are poisoned by it.

The pregnant woman is more easily and severely poisoned since she has less haemoglobin.

Her embryo is also poisoned.

So the embryo is much severely poisoned since its haemoglobin has much greater affinity for carbon monoxide than its mother and its carbon monoxide discharging speed is slower than its mother. This has a great effect on the growth and development of the embryo.

If the pregnant woman is poisoned by carbon monoxide at the beginning, she can give birth to a deformed child or fail or have a stillbirth.