2016
DOI: 10.1210/jc.2015-3872
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Thyroid Hormone Status in Umbilical Cord Serum Is Positively Associated with Male Anogenital Distance

Abstract: In the absence of overt thyroid dysfunction, THs are positively associated with AGD in male newborns. TH effects on body size and head circumference may be modified by maternal secondhand smoke exposure.

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Cited by 11 publications
(14 citation statements)
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“…(2012a) found a positive association between AGD and serum testosterone levels in men attending an andrology clinic. In a study of male newborns in China, the AGD was associated with increased levels of thyroid hormones in cord serum (Liu et al ., ). We found no significant association between AGD and serum hormone levels, possibly due to the relatively small number of boys for whom hormone data were available (187 of 279), especially among those in Tanner stage >G1 (28 of 57 boys).…”
Section: Discussionmentioning
confidence: 97%
See 1 more Smart Citation
“…(2012a) found a positive association between AGD and serum testosterone levels in men attending an andrology clinic. In a study of male newborns in China, the AGD was associated with increased levels of thyroid hormones in cord serum (Liu et al ., ). We found no significant association between AGD and serum hormone levels, possibly due to the relatively small number of boys for whom hormone data were available (187 of 279), especially among those in Tanner stage >G1 (28 of 57 boys).…”
Section: Discussionmentioning
confidence: 97%
“…Thus, several studies in groups of volunteers or men attending andrology clinics have published evidence linking shorter AGD with worse sperm quality (Mendiola et al ., , ; Eisenberg & Lipshultz, ), reduced fertility (Eisenberg et al ., ), azoospermia (Eisenberg et al ., 2012b), and lower testosterone and estradiol levels (Eisenberg et al ., 2012a; Zhou et al ., ). In adults, a shorter AGD has been also related to the risk of prostate cancer (Castaño‐Vinyals et al ., ), while in male human fetuses, newborns, and infants, it has been associated with hypospadias, cryptorchidism, micropenis, and reduced thyroid hormone levels (Hsieh et al ., , ; Jain & Singal, ; Thankamony et al ., ; Liu et al ., ; Gilboa et al ., ).…”
Section: Introductionmentioning
confidence: 99%
“…Low thyroid hormone levels are associated with fetal growth restriction, and there are low circulating total and free thyroid hormones in growth-restricted fetuses (30,45), although there was an insufficient sample to measure thyroid hormone levels in this study. However, free thyroxine and triiodothyronine are not different in cord blood between male and female fetuses (31,48). Whether female and male fetal cardiomyocytes differently express thyroid hormone receptors or critical downstream signaling components remain to be determined.…”
Section: Discussionmentioning
confidence: 98%
“…Only one human study has assessed the effects of FT 3 , FT 4 , and TSH concentrations in cord serum on AGD at birth (18). In female newborns, the overall patterns of association between higher FT 3 and FT 4 and shorter AGD were observed in both our study and the study by Liu et al (18), although the association was not statistically significant in the study by Liu et al These differences are likely due to different neonatal TH concentrations (mean comparison: 1.82 vs. 1.63 for FT 3 ; 14.22 vs. 15.61 for FT 4 ). The concentrations of THs in the previous study were measured in cord serum and not in cord plasma, and the laboratory method used was also different (18).…”
Section: Discussionmentioning
confidence: 99%
“…Shorter AGD has been found to be associated with poor sperm quality ( 15 ), infertility ( 16 ), and lower testosterone concentrations ( 16 ) in men and associated with increased risk of endometriomas and deep infiltrating endometriosis in women ( 17 ). To date, only one human study has assessed the associations of thyroid stimulating hormone (TSH), free triiodothyronine (FT 3 ), and free thyroxine (FT 4 ) concentrations in umbilical cord serum with AGD at birth ( 18 ), indicating that thyroid function may be involved in male gonadal development in early life stages. However, its longitudinal effects at a later age are unknown.…”
Section: Introductionmentioning
confidence: 99%