Hairdressers have been found to have several pregnancy complications when they get pregnant. These risks include fetal death, premature labor, and infertility.

Below are some publications describing these risks

Int Arch Occup Environ Health. 2016 Jul;89(5):739-53. doi: 10.1007/s00420-016-1112-z. Epub 2016 Jan 28.
Reproductive disorders among cosmetologists and hairdressers: a meta-analysis.
Kim D1, Kang MY1,2, Choi S1, Park J1, Lee HJ1, Kim EA3.
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Abstract
PURPOSE:
Occupational risks for reproductive disorders among hairdressers and cosmetologists have been examined in numerous epidemiological studies, although the results of those studies have been inconsistent. Therefore, we conducted a meta-analysis of published studies to evaluate the risks of reproductive disorders among cosmetologists and hairdressers.

METHODS:
We searched the MEDLINE, EMBASE, and Cochrane Library databases, as well as the reference lists of relevant publications, to identify studies for our analysis. After careful consideration, 19 eligible studies were included in the meta-analysis. We also performed systematic evaluations of publication bias, heterogeneity, and publication quality.

RESULTS:
Study-specific odds ratios (ORs) were weighted using the inverse of their variance to calculate fixed- and random-effect pooled estimates. The meta-analysis revealed a significantly increased risk of infertility (OR 1.15, 95 % CI 1.03-1.28), fetal death (OR 1.14, 95 % CI 1.04-1.24), and preterm delivery (OR 1.04, 95 % CI 1.00-1.07) among hairdressers and cosmetologists.

CONCLUSION:
These findings indicate that hairdressers and cosmetologists have a higher risk of reproductive disorders, compared to the general population.