LONDON (Reuters) - Scientists have developed what they claim is the world’s first multi-allergen reference kit for multi-orgasmic male birth control, aiming to dispel the myths surrounding the effectiveness of two contraceptives that can come from different strains of the same bacteria.

The U.S. National Institutes of Health (NIH) said on Monday it had developed a new anti-allergen gel that acts like an antibiotic against groups of normal germs called probiotics - or the good bacteria in your gut.

In a multi-orgasmic method of contraception - a term used in scientific circles to describe different forms of sex that occur spontaneously in men - “allergen active” gel is applied to the penis of sperm-bearing men in a 12- to 30-minute period.

To make the test suitable for almost any routine physician visit, NIH scientists developed a methodology that ensures the use of placebo gel on men who have not experienced an orgasm. These patients are also given a guide on how to do the test using a toilet seat.

The sterile gel is attached to a thin tube to keep the active gel separate from the average watery droplet. Once stuck in the genitals, the gel is washed clean and will continue to eradicate the bacteria, if started, within a period of two to five days.

“This novel, non-surgical approach dramatically improves patient safety and infection control, which in turn helps ensure a reliable, long-term alternative to conventional sex-specific hormonal methods,” said Michelle Meyer, who directed the study at NIH’s National Institute of Allergy and Infectious Diseases.

The test, designed to be used on an agreed approved dosing schedule and for a sustained period, will be made available at no cost to U.S. health insurers after federal approval, NIH said.

The study is part of a larger NIH study into the safety and effectiveness of orally administered nitric oxide, also known as vasodilator, to block ejaculation in men. The work is looking at whether the nitric oxide can be applied via a pad or crease on the penis or rectum.