Can Fertility Drugs Cause Breast Cancer?

The use of fertility drugs is a common method of helping women get pregnant, but there are a number of risks associated with using them. These risks include exposure to drugs that increase ovulation, such as clomiphene, as well as a higher risk of developing breast cancer. In one study, researchers analyzed records of 9,892 U.S. women who were evaluated for infertility during the period 1965 to 1988. Of those women, 38 percent had been exposed to gonadotropins or clomiphene, which are common fertility drugs. Over the three-decade period, 749 women developed breast cancer.

ovulation stimulant drugs

Although there’s a small but significant link between ovulation-stimulating drugs and breast cancer, the risks aren’t large enough to warrant a complete ban on all fertility drugs. However, some studies have suggested that ovulation-stimulating drugs may decrease the risk of breast cancer in some women. This is especially true of Tamoxifen, which has been shown to stimulate ovulation in some women.

These drugs work by causing the ovary to produce less estrogen, which in turn causes the pituitary gland to produce more FSH. They are also known as aromatase inhibitors and are used to induce ovulation in women with infertility problems. They are usually taken early in the cycle, on the second or fifth day after menstruation. In some cases, however, ovulation induction can be done without a period. The recommended dose for aromatase inhibitors is 2.5 to 5 mg per day for five days. They are considered safe and have similar pregnancy rates as CC, but may be more effective in some women with polycystic ovarian syndrome.


Tamoxifen and fertility drugs can help preserve fertility in women diagnosed with hormone-responsive breast cancer. These drugs can also help in the treatment of cancer that has spread to the ovaries. In women who are unable to conceive naturally, co-administration of these drugs with FSH may be an option. This type of treatment is often used to preserve embryos and increase the chance of pregnancy. This type of treatment can take up to two weeks to complete.

Although there are some potential risks of chemotherapy on fertility, women should not delay fertility treatments if they are already at or near childbearing age. Treatment with cyclophosphamide, methotrexate, fluorouracil, and doxorubicin may increase the risk. In addition, some of these drugs are known to affect fertility, so it is important to discuss fertility preservation options with your doctor before starting any treatment.

Ovarian stimulation

Ovarian stimulation and fertility drugs are linked to an increased risk of breast cancer in women older than 40 years. However, some studies found mixed results. In a cohort born between 1960 and 1992, ovarian stimulation was associated with an increased risk of breast cancer among women older than 40 years. Furthermore, ovarian stimulation increases the endogenous levels of estrogen, a hormone that can increase a woman’s risk of breast cancer.

Ovarian stimulation and fertility drugs are used to enhance the release of an egg from the ovaries, which helps women conceive. However, the hormones from these drugs can act on breast cells and make them cancerous. In a recent study, researchers analyzed studies on 1.8 million women who used fertility drugs to conceive. They found no significant increased risk of breast cancer. The researchers said their findings provide reassurance to women undergoing fertility drugs.


Some people worry that the prolonged exposure to high levels of estrogen during IVF can increase the risk of breast cancer in women who are already cancer-free. However, studies have found that this risk is low and does not affect the incidence of breast cancer. However, women who are already diagnosed with the disease should be reminded to undergo regular breast exams. These screening tests, which include 3D ultrasound, can detect changes in the breasts early on in the cycle.

One study found that women with infertility issues were more likely to have dense breasts, which may increase the risk of breast cancer. However, this association was not found in women who underwent a single IVF cycle. This study also found that certain subpopulations of women were more likely to develop breast cancer after IVF. These included women who were taking the hormone-modulator clomiphene, women who remained nulligravid, and those who had undergone IVF at a young age.