IVF is genuinely hard on the body. The process involves weeks of hormone injections, a surgical egg retrieval under anesthesia, and potential follow-up procedures, all of which produce real physical side effects. About 40% of insured women who stop IVF cite the stress and burden of treatment as their primary reason for quitting, making it a bigger factor than cost or insurance loss. Here’s what the process actually feels like, phase by phase.
What Hormone Stimulation Does to Your Body
A typical IVF cycle begins with 8 to 14 days of daily hormone injections designed to push your ovaries into producing multiple eggs at once instead of the usual one. These medications cause your ovaries to swell significantly, sometimes to several times their normal size. The most common physical effects during this phase are bloating, lower abdominal pressure, breast tenderness, headaches, and mood swings. Many women describe feeling like a more intense version of PMS that lasts for nearly two weeks straight.
Weight changes are common during stimulation. Most women gain a few pounds, primarily from water retention. One study found an average increase of about 5 pounds during ovulation induction, with higher gains in women who had a higher starting BMI or polycystic ovary syndrome. In more extreme cases documented in clinical literature, some patients temporarily gained 13 to 15 pounds during stimulation, though this resolved after each cycle ended. The weight gain is largely fluid-related, not fat, but it can still feel uncomfortable and disorienting.
The Injection Routine
Most people don’t anticipate how consuming the injection schedule is. You’ll give yourself subcutaneous shots in the abdomen daily, sometimes twice a day, for the stimulation phase. After egg retrieval, progesterone supplements support the uterine lining for embryo transfer. Progesterone can be given as intramuscular injections into the hip or buttock, or as vaginal suppositories. The intramuscular shots use a longer needle and are known for causing pain, knots, and inflammation at the injection site. Some women need a partner to administer them. Vaginal progesterone avoids the injection pain but comes with its own downsides: irritation, discharge, and the need for multiple applications throughout the day. Neither option is pleasant, and progesterone support can continue for 8 to 12 weeks if pregnancy is achieved.
Egg Retrieval Recovery
The retrieval itself takes about 20 to 30 minutes under general anesthesia. A needle passes through the vaginal wall to drain fluid from each follicle in the ovaries. Afterward, the most common complaints are cramping in the lower abdomen, bloating from enlarged ovaries, light vaginal spotting, fatigue, and mild nausea or dizziness from the anesthesia. These symptoms typically fade within 3 to 5 days.
Most people take only the day of retrieval off work and return to light activities within a day or two. However, you should avoid strenuous exercise and heavy lifting for at least a week. Full recovery, meaning feeling genuinely back to normal, usually takes until your next period starts, roughly 7 to 10 days after retrieval.
Ovarian Hyperstimulation Syndrome
The most significant physical risk of IVF is ovarian hyperstimulation syndrome, or OHSS. This happens when the ovaries overreact to stimulation medications. Mild cases involve bloating, nausea, and abdominal discomfort that resolves on its own. Moderate to severe cases, which occur in roughly 1% to 5% of IVF cycles, can cause significant fluid buildup in the abdomen, difficulty breathing, blood clots, and electrolyte imbalances. Severe OHSS occasionally requires hospitalization and can be life-threatening in rare instances. Fertility clinics monitor for this closely with bloodwork and ultrasounds, and modern protocols have reduced the incidence, but it remains a real possibility.
Exercise and Activity Restrictions
During ovarian stimulation, your enlarged ovaries create a small risk of ovarian torsion, where an ovary twists on itself. Because of this, many clinics restrict physical activity. The guidance varies: some doctors advise no exercise at all, while others allow walking, swimming, yoga, and light treadmill workouts. A randomized trial of more than 200 women found no cases of ovarian torsion in either the exercise or rest group, but the study was too small to prove exercise is completely safe. The general consensus is that mild to moderate activity is fine, especially in the first five or six days of stimulation, but high-impact exercise, sudden movements, and heavy lifting should be avoided. For someone with an active lifestyle, two to three weeks of restricted movement can feel frustrating on top of everything else.
The Emotional Weight Is Physical Too
The psychological toll of IVF manifests physically. Stress during treatment is measurable: researchers have tracked cortisol, the body’s primary stress hormone, in the blood, urine, saliva, and even follicular fluid of IVF patients. Cortisol influences blood pressure, metabolism, and immune function. The relationship between stress and IVF outcomes is complicated. Some studies found that lower cortisol levels were associated with more eggs retrieved, better fertilization rates, and higher pregnancy rates. Others found the opposite. What’s clear is that the body registers IVF as a significant physiological stressor.
Among women who stopped IVF despite having insurance coverage, nearly half of those who cited stress said they simply felt too stressed to continue. Over a third said infertility had taken too much of a toll on their relationship. This isn’t “just” emotional. Chronic stress during treatment contributes to fatigue, disrupted sleep, appetite changes, and muscle tension that compound the direct physical side effects.
What Multiple Cycles Feel Like
Many people need more than one IVF cycle. Each round means repeating the full sequence of injections, monitoring appointments (often early morning, every other day), retrieval, and recovery. The physical burden is cumulative in the sense that you’re putting your body through repeated hormonal stimulation and surgical procedures, often over months or years. Systematic reviews of patient experience consistently identify the physical and psychological burden of treatment as one of the most common reasons couples stop trying. The weight fluctuations, the injection-site soreness, the bloating, and the activity restrictions reset with every new cycle.
Long-Term Effects on Your Body
One of the most common long-term concerns is cancer risk. A large Australian study of more than 417,000 women found that women who used fertility treatments had no higher overall risk of invasive cancer compared to other women. Some specific cancers were slightly more common: ovarian cancer was about 18% to 23% more common in women who had IVF, and uterine cancer and melanoma were also slightly elevated. However, researchers noted that underlying causes of infertility, such as endometriosis and polycystic ovary syndrome, are independently known to increase uterine and ovarian cancer risk. This makes it difficult to separate the effect of the treatment from the effect of the condition that led to treatment. Invasive breast cancer was not increased. The overall finding was described as reassuring by the study’s authors.
IVF is not a minor undertaking. The combination of hormonal side effects, daily injections, surgical recovery, activity restrictions, weight changes, and emotional strain makes it one of the more physically demanding medical processes a person can go through electively. Most of the acute effects resolve within days to weeks of each cycle ending, but the experience of going through it, especially more than once, is something your body genuinely feels.