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Vaccines for Fertility Control - Immunological approaches for development of vaccines have also been tried. One project in India was initiated as a part of family planning programme by Indian Council of Medical Research (ICMR) under the Ministry of Health and Family Welfare, but was transferred to the Department of Biotechnology (DBT) in 1986, Three vaccines are being developed simultaneously:

(i) National Institute of Immunology (NII) developed the first ever birth control vaccine based on the hormone hCG (human chorionic gonadotrophin). The vaccine elicited antibodies against both tetanus and pregnancy hormone hCG. Tetanus is a major killer of pregnant women in India in deliveries taking place outside hospital. The vaccine, therefore, has double benefit.

Women using this vaccine, continue to ovulate and maintain menstrual cycle. The action of vaccine is reversible, but can be prolonged with booster injections. A clinical trial conducted on 105 women showed that the vaccine was well tolerated. Phase II trials on 750 women in three cities were in progress during 1991-92.

No harmful side effects were observed in any of the subjects who received the vaccine. International trials have also been conducted in countries like Finland, Sweden, Chile, Brazil, etc., where results of trials conducted in India were confirmed.

(ii) At Indian Institute of Science (IISc), Bangalore, scientists found that administration of anti-FSH antibodies to male monkeys renders them sterile without any side effects. Studies on safety, efficacy and standardization are being conducted to undertake phase-I trials.

(iii) Another group of scientists at IISc are working on targeting vitamin carrier proteins for contraception. Lowering the concentration of vitamin carrier proteins through the use of antibodies results in rejection of embryo. After the results are established in nonhuman primates, the work would be considered for trials is humans following normal procedures.