There are 2 studies that match your criteria.
Criteria: Study Type=In Vitro,Freq Range=0 - 300 Hz (Static, ELF),Study Subtype=Hormone Changes

View This Study - Citation No: 4378
Title	DIRECT SUPPRESSIVE EFFECTS OF WEAK MAGNETIC FIELDS (50 Hz AND 16 2//3 Hz) ON MELATONIN SYNTHESIS IN THE PINEAL GLAND OF DJUNGARIAN HAMSTERS (Phodopus sungorus).
Reference	J Pineal Res., Vol. 29, Pg. 228 - 233, 2000
Author(s)	Brendel H., Niehaus M., Lerchl A.
PubMed UID	11068945
Project ID	811
View This Study - Citation No: 4409
Title	NOISE MAGNETIC FIELDS MITIGATES THE INHIBITION OF SECRETION FUNCTION OF PRIMARY HUMAN VILLOUS TROPHOBLASTS INDUCED BY 50 Hz MAGNETIC FIELDS
Reference	Zhejiang Da Xue Xue Bao Yi Xue Ban, Vol. 37, Pg. 39 - 44, 2008
Author(s)	Pan Y. M., Sun H. L., Hu G. L., Xu Z. P., Jiang H., Sun W. J.
PubMed UID	18275118
Project ID	2016