The increased use of phthalates and other EDs in the plastic products industry in the last 70 years can explain the worldwide higher prevalence of reproductive disorders. Phthalates modulate levels of Ca2+ levels in the gonadal cells to disrupt the maturation and activation of these cells. At the intracellular level, phthalates act via interaction with the signaling of membrane receptors GnRHR, LHR, FSHR, which regulate steroidogenesis. In males, phthalates can induce testicular dysgenesis syndrome (TDS), which is connected with impaired spermatogenesis. This paper represents an extensive review of results from in silico, in vitro, in vivo studies, and epidemiological studies with the focus on human reproductive health. Phthalates increase the levels of Ca2+ levels in the gonadal cells to inhibit the maturation and activation of these cells.
A Romanian study involved 37 women diagnosed with cervical cancer aged 26–76. A US study by Adibi et al. among 283 pregnant women showed that urinary levels of ∑DEHP during pregnancy caused birth after the 41st gestational week or increased the probability of the section . This study reported significantly higher levels of ∑DBP among the women with recurrent miscarriage .
According to Meltzer et al. , the postnatal exposure to DEHP decreased the estradiol levels in female Sprague-Dawley rats. The timing of the exposure to phthalates can be the source of discrepancies. Exposure to phthalates may induce different toxic effects depending on the sex of the animal, as there are intersexual differences in the individual isoforms of biotransformation enzymes.
If a woman is experiencing symptoms of too much testosterone, it’s best to seek treatment to find the underlying cause. If a woman has too much testosterone in her body, she may begin to notice changes to her physical appearance. Testosterone levels are measured and reported as nanograms per deciliter (ng/dL).
Evidence from both experimental and observational studies supports a connection between exposure to phthalate esters and endocrine function, particularly steroid hormone dysregulation (4). The body’s normal endocrine functioning involves very small changes in hormone levels, yet we know even these small changes can cause significant developmental and biological effects. In conclusion, phthalate exposure interferes with the HPG axis by hormonal and steroidogenic enzyme level fluctuation resulting in the aftereffects on both male and female fertility. Epidemiological studies yielded some conflicting results in the association between phthalate exposure and estradiol levels in men. Hart et al. showed that prenatal exposure to some phthalates could induce increased levels of total testosterone in 20 year-old men. Prenatal exposure to phthalates may induce more severe effects because pregnancy is a sensitive window for toxicant exposure as a result of fetal development . Exposure to phthalates can induce the proliferation of cancer cells, and hence initiates gynecological cancers.
In particular, exposure to phthalates during the prenatal, early childhood, and pubertal periods, when the testosterone-producing Leydig cells in the testes develop (46), may dysregulate testosterone production throughout the life course, with consequences for reproductive function (47). These broad health sequelae of decreased testosterone reinforce the need to identify preventable causes of male hypogonadism, including environmental exposures to possible endocrine disrupting chemicals. Research has linked phthalates with reproductive problems such as genital malformations and undescended testes in baby boys and lower sperm counts and testosterone levels in adult males. Therefore, it is vital to conduct more epidemiological and experimental studies to understand whether and how phthalates can induce the cancer of male reproductive organs. The objective of this review was to analyze the phthalates’ effects on the reproductive system and their endocrine and intracellular mechanisms (see Figure 3). Based on the results from in vitro studies, phthalates increase Ca2+ levels in the gonadal cells to inhibit the maturation and activation of these cells.
Typically, HRT supplements estrogen and progesterone (female hormones), but certain therapies can also deliver testosterone. While it’s known that many men with low testosterone levels, often referred to as T levels, can be asymptomatic, the effects of low testosterone in women are not as well studied. Below is a chart representing the normal range for female testosterone levels by age and ng/dL. The human body is dependent on hormones for a healthy endocrine system, which controls many biological processes like normal growth, fertility, and reproduction. Endocrine-disrupting chemicals (EDCs) are natural or human-made chemicals that may mimic, block, or interfere with the body’s hormones, which are part of the endocrine system. A 2021 study coauthored by Trasande found that phthalates may contribute to 91,000 to 107,000 premature deaths a year among people ages 55 to 64 in the United States.
Phthalates alter cell proliferation and apoptosis via crosstalk between MAPK, NF-kB, PI3K/Akt, and NR. Phthalates modulate the activity of signaling pathways, such as MAPK, NF- κB, and PI3K/Akt, to delay apoptosis and stimulate cell proliferation. These activities could lead to prostate and ovarian cancer onset 110,201. DnBP induced cancer onset via the interaction with ER and the modulation of the MAPK signaling pathway . In the study by Giammona et al. , MEHP was administered orally to several rodent species and strains (1 g/kg to gld and B6 mice and Sprague-Dawley rats; 2 g/kg to Fisher rats). Maternal exposure to DEHP at 40 μg/kg inhibited the DNA methylation of Igf2r and Peg3 genes in F1 and F2 mouse oocytes . Depending on the number of generations affected by epigenetic influence, there are transgenerational or multigenerational effects .
In addition, they conduct laboratory studies that help them prioritize endocrine disrupting chemicals for further toxicity testing. NIEHS leads cutting-edge research projects on endocrine disrupting chemicals to understand how they work and define their role in health and disease. In 1972, prenatal exposure to DES was linked to the development of a rare form of vaginal cancer in daughters whose mothers took DES, and with numerous noncancerous changes in both sons and daughters.

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