The impact of impaired intrauterine growth on male fertility: A systematic review and meta‐analysis

Author:

Meng Fucheng12ORCID,Yao Minglan12,Li Sujuan12,Tian Anran12,Zhang Cai12,Luo Xiaoping12

Affiliation:

1. Department of Pediatrics Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China

2. Hubei Key Laboratory of Pediatric Genetic Metabolic and Endocrine Rare Diseases Wuhan China

Abstract

AbstractBackgroundAdverse intrauterine environment was believed to have deleterious effects on the gonadal function. However, the association between impaired intrauterine growth and fertility in adult males has not been established.ObjectivesTo compare the reproductive rates of males born small for gestational age (SGA), with low birth weight (LBW) or very low birth weight (VLBW) with control groups.MethodsThe Preferred Reporting Items for Systematic reviews and Meta‐Analyses (PRISMA) statement was followed to search PubMed, Web of Science, Cochrane Library, and Embase databases from inception to June 16, 2023. Cohort studies investigating the reproductive rates of males born SGA, with LBW or VLBW were included. A random or fixed effects model was used for different exposures.ResultsA total of 10 studies out of 3,801 records were included. Males born SGA showed a higher risk of infertility than the control group (odds ratio, OR = 0.91, 95% confidence interval, 95% CI 0.89–0.93, = 0.000). The reproductive rates of individuals born with LBW or VLBW were lower than the control group (OR = 0.86, 95% CI 0.78–0.94, = 0.001; OR = 0.57, 95% CI 0.40–0.81, = 0.002, respectively). Participants were further divided into two age groups of 18–35 and 35–45 years. In both subgroups, the reproductive rates were lower in males born SGA, with LBW or VLBW compared with controls. Sensitivity analysis showed the robustness of the pooled estimates among LBW and VLBW.ConclusionIn summary, SGA, LBW, and VLBW were associated with a higher risk of male infertility in both early and middle adulthood. Achieving optimal intrauterine growth would be helpful to prevent male infertility.

Funder

National Key Research and Development Program of China

Publisher

Wiley

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