Cyclofenil is a non-steroidal ancillary drug used by athletes, very similar in action to Clomid® and Nolvadex®. All three act strongly as estrogen receptor antagonists, which gives them the ability to stimulate ovulation in Women and increase testosterone production in men. For athletic purposes this drug is of most benefit to males. typically used for the purpose of increasing endogenous testosterone levels at the conclusion of a steroid cycle. This is in an attempt to avoid a strong hormonal "crash" while waiting for testosterone levels to be restored. HCG is also commonly used for this purpose, but this drug works by mimicking the action of luteinizing hormone, a much different approach. The effect of HCG is very quick, leading it most often to be the first ancillary drug used after steroids are removed. But drugs like cyclofenil. Clomid® and Nolvadex® are better suited for the following weeks. usually continued for some time after HCG has been withdrawn. Women do occasionally find a use for antiestrogens, most often around contest time when the management of endogenous estrogens can help increase fat loss and definition. The side effects that can be brought about by a lowering of estrogen activity in the female body however makes this approach less than ideal.