Scalp hair diameter increases during pregnancy.

@article{Nissimov2003ScalpHD,
  title={Scalp hair diameter increases during pregnancy.},
  author={Joseph Nissimov and Uriel Elchalal},
  journal={Clinical and experimental dermatology},
  year={2003},
  volume={28 5},
  pages={525-30}
}
The hair diameter major-axis has been shown to decrease normally toward the scalp in individual fibres. In this report sharp increases, rather than decreases, of hair-shaft major-axis diameters during pregnancy are described. Mean major-axis hair diameters of 15-20 fibres from each of 12 pregnant and 13 nonpregnant women were measured from the scalp distally at regular 6-mm intervals. Sample diameters were normalized relative to putative times of conception or a distance from the scalp… CONTINUE READING