Reproductive effects of BPA | |
 - Related to early onset of puberty ▪ Earlier age of vaginal opening in female mice [17]. ▪ Increased uterine and ovarian volume in young female humans [33].  - Alter mammary gland development ▪ Larger and more abundant terminal end buds in relation to ducts, decreased apoptotic activity, slowed ductal invasion of the stroma, and increased lateral branching in mammary glands of female mice [18]. ▪ Altered rates of ductal migration into the stroma, increase in the percentage of ducts, terminal ducts, terminal end buds, and alveolar buds; an increase in secretory products within the alveoli of female mice [19].  - Associated with poorer outcome following assisted reproductive technology ▪ Lower number of oocytes retrieved, fewer mature metaphase II oocytes, fewer normally fertilized oocytes, lower serum E2 levels, and a trend for having lower blastocyst formation in women [24]. ▪ Poorer ovarian response, as reflected by fewer oocytes retrieved per cycle and lower serum E2 levels; reduced oocyte maturation and lower fertilization rates in women [25]. | - Role in the pathophysiology of PCOS ▪ Associated with higher levels of both testosterone and androstenedione, as well as insulin resistance, in women with PCOS [28]. ▪ Additionally, higher levels of DHEA in women with PCOS in another study [29]. - Alters ovarian steroidogenesis (increase testosterone production) ▪ PCOS studies: androgen levels (seen above) [28, 29]. ▪ IVF studies: E2 levels (seen above) [24, 25] - Associated with increased risk of recurrent miscarriages ▪ Higher BPA levels in women with 3 or more consecutive 1st trimester miscarriages than in healthy woman [35]. ▪ Higher urinary BPA levels correlated with a 3–9 times increased risk of recurrent miscarriages in women [36]. |
Reproductive effects of phthalates | |
 -Increase reactive oxygen species ▪ MEHP induced oxidative stress by disrupting the activity and the expression of the antioxidant enzymes SOD1 and GPX; also inhibited the expression of Ccnd2, Ccne1, Cdk4, and Bcl-2, but increased Bax expression in the ovarian follicles of female mice [42].  -Alter cell cycle regulation and apoptosis ▪ High doses of MEHP inhibited granulosa cell viability and increased apoptosis rates in the ovaries of female mice [43, 44].  -Negatively correlated with ovarian reserve ▪ Higher levels of urinary phthalate concentrations negatively correlated with antral follicle count in infertile women [50].  - Elevated in endometriosis ▪ Women with endometriosis had significantly higher levels of phthalate metabolites in three different studies [58,59,60]. | -Alters ovarian steroidogenesis and folliculogenesis ▪ Under high concentrations of MEHP, progesterone levels were markedly increased while androstenedione, testosterone, and E2 levels were significantly decreased in female mice [44]. ▪ DEHP significantly inhibited progesterone secretion in a dose-dependent manner, increased plasma prostaglandin F2-alpha levels, downregulated CYP11A, 3β-HSD, and StAR, reduced the numbers and sizes of corpora lutea, and inhibited CD31 expression of corpora lutea in female mice [45]. ▪ MEHP decreased testosterone, estrone, and E2 levels by downregulating mRNA levels of the enzymes: 17alpha-hydroxylase-17,20-desmolase, 17beta-hydroxysteroid dehydrogenase, and aromatase in female mice [46]. |
Reproductive effects of PFAS | |
 -Alters mammary gland development ▪ Relationship between PFOA exposure and mammary gland development in female mice [64, 65].  -Delays puberty ▪ Delay in vaginal opening female mice [66]  -Alters ovarian steroidogenesis ▪ Decrease in ER-α and ER-β expression in the rat ovary [67] ▪ Decrease in serum E2 levels in female rats [67]  -Alters reproductive hormone levels ▪ Serum POFA, PFOS and PFDA levels were negatively associated with serum levels of SHBG, FSH and testosterone in female humans [74]. ▪ Total testosterone concentrations were higher in daughters with prenatal exposure to PFOS or PFOA in female humans [75].  -Increased rates of infertility ▪ Women with higher serum PFOA levels [68] and higher PFNA levels [70] had higher rates of subfecundity ▪ Women with higher serum PFOA levels had longer time to achieve a pregnancy [68] | -Menstrual irregularities ▪ Women with the highest PFOA exposure had increased rates of menstrual cycle irregularities [68]. -Association with miscarriage risk ▪ No association between serum PFOA or serum PFOS levels with miscarriage rate in women [76]. ▪ Little evidence for an association between serum levels of PFOA and miscarriage rate in women [77]. |