A single group of pregnant women who was analyzed in the first and in the third trimesters of pregnancy

A single group of 120 pregnant women separated in smokers (n = 17) and nonsmokers (n = 103) and first pregnancy (n = 54) or multiparous (n = 66) who underwent pulmonary function test and used the individual passive sampler in the first and third trimesters of pregnancy

Inclusion Criteria:

• prior informed consent;
• single pregnancy;
• topical and feasible;
• gestational age of less than 13.86 weeks at the first evaluation;
• absence of preexisting maternal diseases

Exclusion Criteria:

• withdrawal from the project;
• abortion;
• inadequate pulmonary function test