Obstetrics & Gynecology

3,555 questions on Obstetrics & Gynecology, part of Medicine & Health Sciences. Below are 12 of them in full, each answered in plain language.

Questions & explanations

1. What are the four stages of endometriosis according to the rASRM classification?

The rASRM (revised American Society for Reproductive Medicine) classification divides endometriosis into four stages: Stage I (minimal), Stage II (mild), Stage III (moderate), and Stage IV (severe). Staging is based on points assigned during surgery for the size, depth, and location of endometriosis implants, as well as the presence and type of adhesions (scar tissue that sticks organs together). For example, a few small, superficial implants on the peritoneum (the lining of the abdomen) would be Stage I, while deep implants on the ovary with dense adhesions would be Stage IV. Importantly, the stage does not always match the severity of symptoms; a person with Stage I may have severe pain, while someone with Stage IV may have mild symptoms.

2. What is the difference between using a woman's own frozen eggs and using donor eggs to have a baby after cancer treatment?

Using a woman's own frozen eggs means the baby will be genetically related to her, because the eggs came from her body before cancer treatment. Donor eggs come from another woman, so the baby will not share the patient's genes. Frozen eggs are collected and stored before treatment, but they may not survive the thawing process, and success rates depend on age. Donor eggs are often from young, healthy women and have higher success rates, but the child will not be biologically hers. Both methods require in vitro fertilization (IVF), where eggs are fertilized with sperm in a lab and then placed into the uterus. The choice depends on whether the patient wants a genetic link and her chances of success with her own eggs.

3. What is Müllerian agenesis (MRKH syndrome) and how does it present with amenorrhea?

Müllerian agenesis, also called Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, is a congenital condition where the uterus and upper part of the vagina are absent or underdeveloped. The ovaries are normal, so secondary sexual characteristics (breasts, pubic hair) develop normally at puberty. However, because there is no uterus, menstrual blood cannot form, leading to primary amenorrhea (no periods by age 16). Girls often present with cyclic pelvic pain if a small uterine remnant is present. Diagnosis is made by ultrasound or MRI showing absent uterus. Treatment involves creating a functional vagina through dilation or surgery, but pregnancy is not possible without a uterus (surrogacy or transplant may be options).

4. What are the main types of uterine fibroids in the FIGO classification?

The FIGO (International Federation of Gynecology and Obstetrics) classification system divides uterine fibroids into nine types (0 to 8) based on their location in the uterus. Type 0 is a pedunculated (on a stalk) intracavitary fibroid that is completely inside the uterine cavity. Type 1 and 2 are submucosal fibroids that are mostly inside the cavity but with some muscle involvement. Type 3 to 5 are intramural fibroids that are mainly within the uterine muscle. Type 6 and 7 are subserosal fibroids that bulge outward from the uterus. Type 8 is a fibroid attached to the uterus by a stalk (pedunculated subserosal). This classification helps doctors choose the best treatment, such as surgery or medication.

5. What is the surgical management for Müllerian agenesis and what are the options for creating a neovagina?

Surgical management for Müllerian agenesis focuses on creating a functional vagina (neovagina) to allow for sexual intercourse. The most common method is the McIndoe procedure, where a skin graft is used to line a surgically created space between the bladder and rectum. Another option is the Vecchietti procedure, which uses a traction device to gradually stretch the vaginal dimple over several days. Non-surgical options include progressive dilation with vaginal dilators, which can be very effective. Surgery is usually done after puberty when the patient is ready. It is important to note that these procedures do not create a uterus, so pregnancy is not possible without surrogacy or uterine transplant.

6. What is the 'gender revolution' in the context of fertility?

The gender revolution refers to the shift from traditional roles where men work and women care for home and children, toward more equal sharing of paid work and unpaid family work between men and women. In fertility, it means that when both partners share earning and caregiving, women can have children without giving up careers. Studies show that in countries with high gender equality, fertility rates are often higher because women feel supported to combine work and family. For example, in Nordic countries like Sweden, generous parental leave and affordable childcare help parents balance work and children. So gender equality can boost fertility by reducing the conflict between work and family.

7. If a man has no sperm in his ejaculate, how can doctors retrieve sperm directly from his testicles?

When a man has no sperm in his ejaculate, a condition called azoospermia, doctors can use surgical sperm retrieval to get sperm directly from the testicles or epididymis (the tube that stores sperm). One common method is testicular sperm extraction (TESE), where a small piece of testicle tissue is taken and examined for sperm. Another method is microdissection TESE (micro-TESE), which uses a microscope to find the best areas with sperm. The retrieved sperm can then be used for in vitro fertilization (IVF) with intracytoplasmic sperm injection (ICSI), where a single sperm is injected into an egg. This allows men with blockages or poor sperm production to father biological children.

8. Compare the management of exercise-induced amenorrhea in a recreational athlete versus an elite athlete. What differences might there be?

For a recreational athlete, management often starts with increasing calorie intake and reducing exercise by 10-20%. She can usually return to normal activity once periods resume. For an elite athlete, changes must be more careful to maintain performance. A sports dietitian and coach work together to adjust training load and nutrition. The elite athlete may need temporary reduction in training intensity rather than stopping. Both need to correct low energy availability, but the elite athlete may also require psychological support to handle pressure. Bone health monitoring is important for both, but elite athletes may need earlier intervention with calcium and vitamin D supplements.

9. Can women with a history of anorexia or bulimia have normal fertility after recovery? What factors affect this?

Yes, many women can have normal fertility after recovery from anorexia or bulimia, but it depends on full recovery. Fertility returns when regular menstrual cycles resume, which usually requires reaching and maintaining a healthy weight and normal eating patterns. Women who recover early and maintain a healthy weight have good chances of conceiving naturally. However, some may have persistent ovulation problems or other health issues like low bone density that can affect pregnancy. It is important to be free from eating disorder behaviors for at least a year before trying to conceive. Medical support during pregnancy is also recommended to prevent relapse.

10. How does a submucosal fibroid (Type 1) differ from a subserosal fibroid (Type 6) in symptoms?

A submucosal fibroid (Type 1) grows just under the lining of the uterine cavity and often causes heavy, prolonged menstrual bleeding and pain, because it distorts the cavity and affects the endometrium (the lining). In contrast, a subserosal fibroid (Type 6) grows on the outer surface of the uterus and may cause pressure symptoms like a feeling of fullness, bloating, or frequent urination if it presses on the bladder, but it usually does not cause heavy bleeding. For example, a woman with a large subserosal fibroid might have a visible bulge in her lower belly but normal periods, while a woman with a small submucosal fibroid might have very heavy periods.

11. How does imperforate hymen cause amenorrhea and what are the symptoms?

Imperforate hymen is a condition where the hymen completely covers the vaginal opening, blocking menstrual blood from leaving the body. Girls typically have normal breast development and pubic hair, but they do not have visible periods. Instead, they experience cyclic pelvic pain every month as blood accumulates in the vagina (hematocolpos) and sometimes in the uterus (hematometra). There may be a bulging bluish membrane at the vaginal opening. This is usually diagnosed soon after the expected age of menarche. Treatment is a simple surgical procedure to make a small incision in the hymen to release the trapped blood. After that, periods occur normally.

12. How do eating disorders like anorexia and bulimia cause menstrual dysfunction?

In anorexia, severe calorie restriction leads to low body weight and low body fat. This reduces the production of leptin, a hormone from fat cells that signals the brain. Low leptin tells the hypothalamus to stop releasing GnRH, which stops ovulation and periods (amenorrhea). In bulimia, cycles of bingeing and purging cause fluctuations in energy and nutrients, also disrupting GnRH release. Both conditions create a state of low energy availability, similar to exercise-induced amenorrhea. The body prioritizes survival over reproduction, so periods stop. Even if weight is normal, purging can cause electrolyte imbalances that affect hormone regulation.

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