Infertility is clinically defined as not being able to get pregnant after one year of regular, unprotected sex, or after six months if the woman is over 35. About 13.4% of women ages 15 to 49 have impaired fertility, and nearly 14% of women ages 20 to 49 have used fertility services at some point. But you don’t necessarily have to wait a full year to start paying attention to your body’s signals. Several physical signs can point to fertility problems well before you hit that timeline.
Signs of Infertility in Women
The most telling clue is your menstrual cycle. A cycle shorter than 21 days, longer than 35 days, or one that’s wildly unpredictable often means you’re not ovulating regularly. Absent periods are an even stronger signal. Ovulation is the non-negotiable step in conception, so any disruption to it directly affects your ability to get pregnant.
Beyond cycle irregularity, pay attention to pain. Severe pelvic or lower-back pain during your period, pain during sex, or painful bowel movements and urination can all point to endometriosis, a condition where tissue similar to the uterine lining grows outside the uterus. Heavy menstrual bleeding or spotting between periods also falls into this category. Endometriosis is a well-established cause of infertility, and pain levels range from mild to debilitating.
Hormonal symptoms are another window into what’s happening internally. Acne that won’t clear up, unusual hair growth on your face, chest, or back, thinning hair on your head, weight gain concentrated in the upper body, and darkened skin around the neck or body folds are hallmarks of polycystic ovary syndrome (PCOS). PCOS is one of the most common causes of irregular cycles and infertility because elevated hormone levels interfere with egg development and release. Symptoms typically appear around the start of menstruation but can develop later.
Significant stress, very high or very low body weight, and rapid weight changes can also shut down ovulation by disrupting the hormonal signals from your brain to your ovaries. If your periods disappeared after a major life change or dramatic shift in weight, that’s worth investigating.
Signs of Infertility in Men
Male-factor infertility contributes to roughly half of all infertility cases, yet it’s often overlooked. The signs are subtler than in women, but they exist. Problems with sexual function are the most direct indicators: difficulty maintaining an erection, trouble with ejaculation, noticeably low semen volume, or reduced sex drive.
Physical changes matter too. Pain, swelling, or a lump in the testicle area warrants attention. Unusual breast tissue growth, decreased facial or body hair, and other signs of hormonal imbalance can all point to conditions that affect sperm production. A history of testicular surgery or current testosterone treatment (which, counterintuitively, can suppress sperm production) are also red flags.
Conditions That Affect Fertility
Two conditions deserve special attention because they’re common and frequently linked to difficulty conceiving.
PCOS is diagnosed when a person has at least two of three features: irregular or infrequent periods, elevated levels of certain hormones (or visible hormonal symptoms like acne and excess hair growth), and enlarged ovaries with multiple immature follicles visible on ultrasound. It’s tied to insulin resistance and can make weight management harder, which compounds the fertility issue.
Endometriosis is harder to pin down. Diagnosis often involves a pelvic exam, imaging like ultrasound or MRI, and sometimes laparoscopy, a minor surgical procedure that allows a doctor to visually confirm tissue growing where it shouldn’t be. Many people with endometriosis go years without a diagnosis because pelvic pain gets dismissed as “normal” period pain.
Other conditions that can quietly impair fertility include primary ovarian insufficiency (when the ovaries stop functioning normally before age 40), excess prolactin production from the pituitary gland (which reduces estrogen and disrupts ovulation), prior pelvic inflammatory disease, and a history of sexually transmitted infections that may have caused scarring.
What Fertility Testing Looks Like
If you suspect something is off, testing can give you concrete answers. For women, the process typically starts with blood tests measuring two key hormones. One test, drawn around day three of your cycle, measures how hard your brain is working to stimulate your ovaries. The other measures a hormone produced by your developing eggs and gives a snapshot of your remaining egg supply. Levels below 1 nanogram per milliliter on that second test may suggest a declining supply, though a single number doesn’t predict whether you can get pregnant.
Structural tests look at whether your fallopian tubes are open and whether anything inside the uterus, like fibroids, polyps, or scar tissue, could prevent a fertilized egg from implanting. One common procedure involves injecting dye through the cervix and using X-rays to track it through the uterus and tubes. Another uses saline and ultrasound to examine the uterine lining, sometimes followed by injecting tiny bubbles to check whether the tubes are clear. Both procedures are done in a clinic and are relatively quick.
For men, a semen analysis is the cornerstone test. It evaluates sperm count, movement, and shape, all of which affect the ability to fertilize an egg.
Why At-Home Tests Only Tell Part of the Story
At-home fertility kits for men can measure sperm count, and ovulation predictor kits can help women identify their fertile window. These aren’t necessarily inaccurate, but they’re limited. A home sperm test might show a normal count of 100 million sperm, but if none of them are moving properly, fertility is still compromised. Only a lab analysis can assess motility, shape, and other factors that matter just as much as quantity.
Similarly, ovulation kits confirm a hormonal surge that usually precedes ovulation, but they can’t tell you whether the egg was actually released, whether your tubes are open to receive it, or whether the uterine lining is receptive to implantation. Think of at-home tests as a starting point, not a diagnosis.
Red Flags That Warrant Earlier Evaluation
The standard advice is to try for a year (or six months if you’re over 35) before seeking help, but certain situations call for an earlier conversation with a specialist:
- Absent or very irregular periods
- Regular significant pelvic pain
- A history of sexually transmitted infections
- Previous abdominal or tubal surgery
- Upper body weight gain with acne and unusual hair growth
- Two or more miscarriages
- A partner with a history of testicular surgery or sexual dysfunction
- A partner currently on testosterone therapy
- Known genetic conditions you want to avoid passing on
None of these signs guarantee infertility. Many people with irregular cycles, PCOS, or even mild endometriosis conceive without intervention. But they are signals that your body is giving you information worth acting on, and getting tested earlier means more time and more options if treatment turns out to be helpful.