The season in which a pregnant woman is in her first trimester may determine what type of allergies her child may develop later in life, according to a study published in the Journal of Epidemiology and Community Health.

During a five-year trial, researchers monitored allergy patterns of approximately 6,000 infants born between 2001 and 2006. The team discovered that if the first trimester was in between April or May, the infants’ were at a three times increased risk of developing allergies to milk and eggs.

In fact, if the 11th week of fetal development occurred in April or May, approximately 11 percent of these children developed food allergies. However, women in their first trimester between December and January gave birth to children with a 6 percent risk of suffering these allergies.

Furthermore, children born in the fall or winter were more likely to develop signs of allergies, such as eczema or wheezing.

The researchers concluded that depending when the fetus first develops, its body may build up different antibodies that stave off specific types of allergies.

Each year, approximately 4 percent, or one in 25 people in the U.S., are diagnosed with food allergies, according to the Food Allergy and Anaphylaxis Network.