Why does obesity lead to infertility? Lin Yun analyzed that overweight men often have an impressive "general's belly." The accumulation of large amounts of fat in the abdomen leads to poor heat dissipation in the scrotum, which is not conducive to sperm survival. Additionally, according to foreign research, if the fat layer in the lower abdomen of men is too thick, during intercourse, skin folds can block the genitals, shortening their relative length and reducing the quality of sexual life. Liu Jianqiao pointed out that due to obesity, overweight people cannot complete certain sexual positions, significantly reducing the quality of sexual life.
Obese Men Lack Sexual Desire
Obese Women Have Lower Ovulation Rates, Lower Conception Rates
When guiding infertile patients to lose weight, doctors have discovered some effective techniques.
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Male:
Solution:
If obese individuals conceive without losing weight, it increases the risk of pregnancy and adds danger factors for both mother and baby. "For example, obesity may lead to hypertension or diabetes during pregnancy, all of which are factors leading to miscarriage or premature birth," Liu Jianqiao pointed out that after becoming pregnant, obese women have a significantly higher rate of miscarriage, with a higher possibility of embryo loss throughout the pregnancy period. Therefore, it is not recommended for obese individuals to become pregnant without losing weight first.
Obesity Reduces Fertility in Both Sexes
For men, excessive obesity can lead to endocrine dysfunction, often accompanied by high blood lipids, high blood pressure, and high blood sugar. This not only reduces sexual function but also lowers male hormones, leading to a decrease in sexual desire.
Moreover, overweight people find it difficult to choose partners, and some suggest "obese couples uniting." However, Lin Yun stated that if an obese man and woman marry, their combined obesity could have an "amplifying effect" on the infant, making the baby a chubby child at birth. Therefore, for better reproductive health, both obese men and women should consider losing weight before trying to conceive.
To Have a Baby, Lose Weight First
● To have a baby, lose weight first; family support is most important
Chinese grandparents love to raise their grandchildren to be plump, thinking it benefits their growth, unaware that being too fat can instead plunge their family into a "descendant crisis"! Data from reproductive medicine centers shows that "little chubsters" entering the reproductive age are more likely to suffer from infertility. Especially among female obese individuals, the likelihood of infertility is three times higher than in normal-weight women. Even with assisted reproductive treatments, they endure more suffering due to low conception rates.
In fact, obesity has a more pronounced impact on women. "Obesity is one of the main causes of female infertility," Liu Jianqiao pointed out that the infertility in obese women mainly stems from how obesity affects endocrine hormones related to ovulation and conception. Obese individuals often experience insulin resistance and hyperinsulinemia, where hyperinsulinemia stimulates the ovaries to secrete excessive male hormones, thus triggering symptoms such as oligomenorrhea or amenorrhea, and polycystic ovarian syndrome (PCOS).
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"To solve infertility caused by obesity, it’s best to start from childhood and avoid creating too many 'little chubsters,'" Liu Jianqiao pointed out that obesity during childhood may affect endocrine functions, causing irregular menstruation, which can lead to a series of health problems and conception obstacles later in life. If one waits until planning for a baby to start catching up, the effort will be doubled and the results less rewarding, making it unprofitable.
"The General Belly" Threatens Sperm Activity
"Reducing weight can significantly improve the fertility of obese patients; therefore, losing weight through diet and exercise is the preferred method for treating infertile obese patients," said Liu Jianqiao. Generally, females who do not ovulate due to obesity see about 20% of them restoring normal ovulation when their body weight decreases by 5%~7%. Lin Yun pointed out that losing weight not only impacts successful conception but after scientifically reducing weight, returning to normal weight and successfully conceiving, it can significantly improve the health of both the pregnant woman and the fetus.
It’s Hard to Persist Alone When Losing Weight, Collective Effort Works Better
"Female obese individuals have a much higher infertility rate compared to those of normal weight, and treatment is more complicated and less effective," Lin Yun said. Obese individuals can increase their chances of conception by taking ovulation-inducing drugs.
With changes in diet structure and lifestyle, there are more and more obese people. Obesity not only affects appearance but also brings various issues such as hypertension, high blood lipids, and diabetes. As fertile men and women, the impact of obesity on fertility deserves more attention. "The BMI index (i.e., weight divided by height squared) for Asians is between 18~22.9, and anything over 23 falls within the overweight range, affecting fertility," Dr. Liu Jianqiao, deputy director of the Reproductive Medicine Center at the Third Affiliated Hospital of Guangzhou Medical College, pointed out that although Guangdong patients are only between overweight and obese, they already face difficulties in reproduction.
2. Group Weight Loss is Better than Solo Efforts
● Overweight men lack sexual desire, poor sperm activity; overweight women have an infertility risk three times higher than normal people.
"The impact of obesity on fertility is mainly reflected in two aspects: first, obesity can cause reproductive disorders such as polycystic ovary syndrome, oligomenorrhea, or amenorrhea, and secondly, it reduces female sexual desire, lowering the chances of conception," Liu Jianqiao mentioned that obese individuals have a three times higher chance of infertility compared to those of normal weight. Thirty-eight to sixty-five percent of polycystic ovary syndrome patients have a history of obesity, and obese individuals are three times more likely to experience ovulation disorders due to non-ovulation compared to normal women.
Mr. Lin from Guangzhou has been married for three years, and his wife has never conceived. Originally, weighing over a hundred kilograms, he frequently felt drowsy due to oxygen deficiency in the brain. When driving out, he would often fall asleep while waiting for red lights. Even when waiting at the reproductive medicine center for his appointment, he started snoring. Since sexual activity requires physical exertion, but because of his excessive weight, Mr. Lin felt uncomfortable after slight movement and was unwilling to engage in intercourse. With fewer instances of coitus and poor quality of sexual encounters, it naturally became difficult to successfully conceive.
Low Success Rate in Making Babies
Weight Loss Tips: No Account?
Many families don't believe that infertility is related to obesity, thinking that women preparing for pregnancy should strengthen their nutrition. This mindset subtly affects the success rate of women losing weight. Liu Jianqiao emphasized that the perseverance of the person losing weight and encouragement from the family are both crucial. A female patient from Guangzhou lost over five pounds in a month through exercise, but her family discouraged her, saying, "Anyway, it hasn't made you thinner, why not eat this time and worry later?" Later, under the doctor's advice, her husband came to the hospital to receive education about conception, understanding the relationship between weight loss and fertility. Afterward, he actively encouraged his wife to lose weight and took on the role of a supervisor, allowing her to successfully lose weight and conceive.
Higher Failure Rate for In Vitro Fertilization in Overweight Women
If obese patients have increased waistlines and their body shape resembles a pear, it is called "pear-shaped obesity." "If the waist-to-hip ratio is greater than 0.8, it belongs to pear-shaped obesity. Male and female patients of this type have a higher incidence of infertility," Deputy Director Lin Yun of the Reproductive Medicine Center at the Guangdong Provincial People's Hospital pointed out that pear-shaped obesity is mostly caused by genetic predisposition and nutritional excess.
Medical Guidance / Chief Physician Liu Jianqiao, Deputy Director of the Reproductive Medicine Center at the Third Affiliated Hospital of Guangzhou Medical College, and Deputy Director Lin Yun of the Reproductive Medicine Center at the Guangdong Provincial People's Hospital
● Research from reproductive medicine centers shows that overweight individuals are more prone to infertility
Lin Yun pointed out that obese individuals often accompany high blood sugar and high blood lipids, so they must pay attention to the proportion of proteins, fats, and carbohydrates when eating pre-pregnancy and during pregnancy. Exercise is also an effective way to reduce weight, but high-intensity exercise is not recommended. "The key to exercise is persistence," she recommended brisk walking. One can consciously speed up their pace when commuting to work, buying groceries, or shopping. "Each session lasting ten minutes, and persisting for more than half an hour daily can achieve good weight loss results," Lin Yun said. It is essential to move after meals; lounging on the couch watching TV after eating will not yield results.
Lin Yun said that in cases where diet and exercise fail to result in weight loss, medications like metformin can be used for weight loss. "Although this is a class B drug and relatively safe, it should not be taken arbitrarily," Lin Yun reminded that before taking the medication, one must undergo four tests: blood glucose, insulin, blood lipids, and glucose tolerance. Only if all four tests show no issues can the medication be taken, and it must be combined with exercise to be effective. Additionally, the drug has certain side effects, such as reduced appetite and diarrhea, so it must be strictly followed as per the doctor's instructions, and the dosage should not be increased arbitrarily.
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Harm 1:
"Even though obese individuals require larger doses than normal-weight individuals, they are still prone to insensitivity." Among her patients, a lady with a BMI of 28.9 failed three rounds of artificial insemination. "The general success rate of artificial insemination is between 40%~70%, and normal individuals usually get pregnant after one or two attempts," Lin Yun introduced. Based on her experience, the success rate of IVF for obese individuals is lower than for normal-weight individuals because "the egg quality of obese individuals is low, and the unfavorable uterine environment and damage to the endometrial receptivity can reduce the fertility of obese patients."
Hazard 2:
Not only does infertility pose risks. Lin Yun pointed out that obese individuals, due to long-term anovulation or oligomenorrhea, lead to an accumulation of androgens, easily causing endometrial hyperplasia, making them a high-risk group for endometrial cancer.
Other effective forms of exercise include walking with ankle weights, playing badminton, table tennis, swimming, etc. Swimming is the best way to lose weight and slim down and can also protect the lumbar vertebrae and neck and shoulders.
Female:
Lin Yun pointed out that male infertility is mostly related to poor semen quality and fatty liver factors. "Clinically, infertility caused by male factors accounts for about thirty percent," Lin Yun indicated that among the male infertility patients she treated, half had abnormal liver function, almost all due to visceral obesity (fatty liver) induced.
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