Evening Primrose Oil

Evening Primrose Oil

Common Name and Latin Name

Oenothera biennis: Latin name EPO,

Evening primrose oil: Common Name

What Is It?

Evening Primrose Oil is derived from the seed of the Evening Primrose plant (see photo above). The seeds are high in Omega-6 fatty acids, Gamma Linoleic Acids, and Linoleic Acids. Linoleic Acids are important in the production and synthesis of prostaglandins. The properties of Evening Primrose Oil help to balance hormones and improve healthy cell growth. The chance of becoming pregnant naturally is increased when you have a normal and healthy balance of hormones such as estrogen, progesterone, and prostaglandin. The use of Evening Primrose Oil could potentially increase your chances of a speedy, healthy, and natural conception.

How Does Evening Primrose Oil Work to Improve Fertility? 

The properties in Evening Primrose Oilhelp to regulate hormones in the body that are important for fertility. Prostaglandin production and synthesis is improved with the use of this herb and helps to promote overall hormonal balance. Evening Primrose Oil is not a hormone but it can mimic various hormones and helps to deliver messages to the brain to produce more fertility-improving hormones. For hundreds of years EPO has been used by naturopaths and herbalists to treat cervical mucus conditions in women. Inadequate cervical mucus can hinder the sperms ability to journey through the cervix. Using EPO can help improve the cervical environment so that sperm can travel freely to the uterus. EPO also helps with cell growth. Cell growth also includes the cells of the uterus. Using EPO can help to strengthen and tone the lining of the uterus and thus promote fertility.

Should I Take Evening Primrose Oil?

Evening Primrose Oilcan be taken as soon as you begin trying to conceive. It not only helps to promote fertility by balancing hormones, improving cervical mucus, and toning the uterus, but it also has positive effects for women who suffer from PMS. Many women report that using this herb eased their symptoms of PMS. They experienced less bloating, cramping, and irritability. If you have had a history of miscarriages due to a weak uterus, you may benefit from this herbal supplement. This supplement could help improve the health and strength of your uterus and thus promote a healthy pregnancy. It is important that you do not take this supplement once you begin ovulating. This supplement should not be taken if you could possibly be pregnant. The toning of the uterus caused by the properties of the herb could cause uterine contractions that may lead to miscarriage. It is important to keep an ovulation calendar so that you know when your ovulation begins. When you begin ovulating you should stop taking EPO until you are certain you are not pregnant.

Suggested Usage and Dosages for EPO for Fertility 

Typically, the dosage of EPO is 1,500 to 3,000 mg once or twice per day during Day 1 through Day 14 of your cycle. You may want to switch to Omega-3 EFA oil or cod liver oil after these days. These two types of oils are safe to use if you do become pregnant.Red Raspberry Leaf, Vitex, and Maca are common fertility herbs used in conjunction with Evening Primrose Oil. You can also use castor oil packs to help increase blood flow to your reproductive organs. The packs can help strengthen the uterus in conjunction with EPO.

Side Effects of Using Evening Primrose Oil for Fertility 

Mild nausea, vomiting, upset stomach, and diarrhea have been reported by some women who have used EPO for fertility. There are no published reports of major side effects of using Evening Primrose Oil by women who are not pregnant. Women who are pregnant are at risk for miscarriage if they use this herbal supplement. This supplement can cause the uterus to contract and thus could lead to pre-term labor or miscarriage. It should be avoided during ovulation and until you are certain you are not pregnant. Typically, this herb should only be used during Day 1 through Day 14 of your cycle.


You should likely avoid using EPO if you have a bleeding disorder. EPO increases blood flow and for those with bleeding disorders this could prove dangerous. You should speak to your healthcare provider about these concerns if you do have a blood disorder. Some reports indicate that seizures could worsen and become more frequent when using this herbal remedy for fertility. This remedy does not cause seizures in those who do not already have the disorder. If you suffer from schizophrenia and take medications such as those with phenothiazine, you should speak to your healthcare provider prior to using this herbal treatment.