Someone has already answered this in great detail, so I'll just summarize it in two brief sentences.

First, allergies of pregnant mothers will not affect the growth and development of the fetus.

Second, allergies can be inherited.

Pregnant mothers are allergic, will it affect the fetus in the womb?

Pregnant mothers who are allergic will not affect the fetus in the belly, but the fetus may also inherit this allergy, the treasure mother must pay attention to the careful use of medication during pregnancy, stay away from some allergic drugs or food.

The first allergic drug or food can be passed on to the fetus.

During pregnancy, the mother should stay away from allergens, these allergens will be passed to the fetus through the placenta, although the baby will not be able to say whether there will be a hereditary constitution, generally allergy weight will be contemporary inheritance or intergenerational inheritance, in order to the good development of the fetus during pregnancy should be careful.

Secondly, if you are already taking medication, you should work with your doctor to remedy the situation.

If the mother has already been exposed to allergy medication, please go to the hospital for examination in time, and cooperate with the doctor's advice to take reasonable remedial measures.

Thirdly the earlier the baby is delivered the better the intervention will be for the baby.

After the baby is born and the body is mature, the mother can try to expose the baby to allergens as early as possible, which will activate the baby's body allergy factors in advance, which will be very beneficial to the baby's future development and growth!

The answer to the question of whether or not a mother's allergies will affect the fetus in her stomach is first of all no, they will not affect the fetus in her stomach. If the mother is allergic, she should pay more attention to her allergens in her diet and living environment. In case of allergies, you may need to take medication or injections, which may affect the fetus in your belly.
If the mother is allergic and allergies are hereditary, chances are that the baby will also be allergic.

This is what happened to a coworker close to me, she is allergic and what she is allergic to, her daughter is allergic to. One time, my coworker ate fungus and was allergic to it, and she got goosebumps all over her neck. Her daughter ate it too, and the same thing was a patch of bumps.
Allergies need attention: 1. Avoid allergens, such as do not eat seafood.
Feed with hydrolyzed protein formula, etc. 2. Add probiotics to regulate the stomach and intestines, increase the intestinal flora, strengthen the body and improve allergies.

In the diet and life care should pay extra attention. Finally, remind parents, baby allergies on the one hand to pay attention to avoid, on the other hand, if it has been serious, or symptoms manifested then must use the correct method of timely treatment, do not misuse of prescriptions, not to mention the indiscriminate use of some hormone drugs, it is recommended to the regular hospital treatment or to find the regular manufacturers of regular products for treatment!