News | Genetics Reveals Links Between Reproductive Aging and Health Risks
Scientists are uncovering how genetics influences reproductive timing, aging, health, fertility trends, and offspring. A recent Nature Aging study offers new insight into links among reproductive traits, health, and longevity.
Genetic Mechanisms of Reproductive Traits and Aging
Genetics, biology, and socioeconomic factors shape human reproduction. Puberty and first birth occur earlier in some populations, fertility rates have fallen, and parenthood is increasingly delayed. First births commonly occur after age 30, when female fertility is already declining. About one in six couples worldwide experiences infertility, with lifetime prevalence estimated at 17.5%.
These changes relate to contraception, economic uncertainty, health, legal abortion, difficulty finding a partner, and gender norms. As parenthood is delayed, genetic influences deserve greater attention.
Genetics of Reproductive Traits and Aging Risk
Later menopause is associated with longer life but may raise hormone-sensitive cancer risk through prolonged estrogen exposure, suggesting an evolutionary trade-off.
Since the mid-2000s, genome-wide association studies (GWAS) have expanded knowledge of reproductive aging and fertility. Studies of age at first birth, testosterone, miscarriage, male voice change, endometriosis, and number of children have identified thousands of associations and 37 genes or loci linked to at least four reproductive traits.
FSHB was most strongly associated, with 11 reproductive traits. DNAH2 was linked to uterine fibroids, age at menarche, testosterone, and sex hormone-binding globulin (SHBG). ESR1 was linked to age at first sex, first birth, and testosterone.
Reproductive genetics also overlaps with osteoporosis, breast cancer, cardiovascular disease (CVD), and behavioral traits. Earlier menarche, for example, is associated with higher risks of cardiovascular disease, type 2 diabetes, and obesity.
Reproductive Aging, Offspring Health, and Longevity
Older parental age may increase new mutations and risks including autism, schizophrenia, and miscarriage, through maternal chromosomal errors and paternal mutations.
Later menopause is associated with longer life and lower morbidity and mortality. Reproductive window, age at menarche, and age at childbirth are also associated with longevity; earlier first birth is often linked to lower mortality.
Evolutionary Perspective and the “Grandmother Effect”
The grandmother hypothesis proposes that women's long post-reproductive lifespan helps support children and grandchildren, highlighting links between aging and reproductive lifespan.
Conclusion
Research still focuses mainly on women, leaving male traits understudied. More male data and greater ancestral diversity beyond predominantly European GWAS samples are needed.
News | Genetics Reveals Links Between Reproductive Aging and Health Risks
News | Genetics Reveals Links Between Reproductive Aging and Health Risks
Scientists are uncovering how genetics influences reproductive timing, aging, health, fertility trends, and offspring. A recent Nature Aging study offers new insight into links among reproductive traits, health, and longevity.
Genetic Mechanisms of Reproductive Traits and Aging
Genetics, biology, and socioeconomic factors shape human reproduction. Puberty and first birth occur earlier in some populations, fertility rates have fallen, and parenthood is increasingly delayed. First births commonly occur after age 30, when female fertility is already declining. About one in six couples worldwide experiences infertility, with lifetime prevalence estimated at 17.5%.
These changes relate to contraception, economic uncertainty, health, legal abortion, difficulty finding a partner, and gender norms. As parenthood is delayed, genetic influences deserve greater attention.
Genetics of Reproductive Traits and Aging Risk
Later menopause is associated with longer life but may raise hormone-sensitive cancer risk through prolonged estrogen exposure, suggesting an evolutionary trade-off.
Since the mid-2000s, genome-wide association studies (GWAS) have expanded knowledge of reproductive aging and fertility. Studies of age at first birth, testosterone, miscarriage, male voice change, endometriosis, and number of children have identified thousands of associations and 37 genes or loci linked to at least four reproductive traits.
FSHB was most strongly associated, with 11 reproductive traits. DNAH2 was linked to uterine fibroids, age at menarche, testosterone, and sex hormone-binding globulin (SHBG). ESR1 was linked to age at first sex, first birth, and testosterone.
Reproductive genetics also overlaps with osteoporosis, breast cancer, cardiovascular disease (CVD), and behavioral traits. Earlier menarche, for example, is associated with higher risks of cardiovascular disease, type 2 diabetes, and obesity.
Reproductive Aging, Offspring Health, and Longevity
Older parental age may increase new mutations and risks including autism, schizophrenia, and miscarriage, through maternal chromosomal errors and paternal mutations.
Later menopause is associated with longer life and lower morbidity and mortality. Reproductive window, age at menarche, and age at childbirth are also associated with longevity; earlier first birth is often linked to lower mortality.
Evolutionary Perspective and the “Grandmother Effect”
The grandmother hypothesis proposes that women's long post-reproductive lifespan helps support children and grandchildren, highlighting links between aging and reproductive lifespan.
Conclusion
Research still focuses mainly on women, leaving male traits understudied. More male data and greater ancestral diversity beyond predominantly European GWAS samples are needed.
Source:
Collected online