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Summary
Talwar GP et al.  
Status of a Unique Vaccine against hCG for Contraception and Advanced Stage Cancers expressing ectopically hCG

Journal für Reproduktionsmedizin und Endokrinologie - Journal of Reproductive Medicine and Endocrinology 2015; 12 (4): 268-273

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Dear Egon!
God bless you on your 95th Birthday! May you complete 100 years.
Being submitted in your honor is a brief article on my continuing work to make available a unique vaccine preventing pregnancy in women without blocking ovulation, her normal production of sex steroid hormones and retaining her regular menstrual cycles and bleeding profiles.
The vaccine is directed at the Human chorionic gonadotropin (hCG), which emerges following fertilization of the egg [1]. Healthy, non-pregnant women do not make it, the basis on which its detection in serum or urine serves as a reliable test for diagnosis of pregnancy. It plays a critical role in implantation of the embryo & thereby to the onset of pregnancy. The purpose of the vaccine is to generate bioeffective antibodies neutralizing hCG & thereby prevent the onset of pregnancy.
As you can imagine, the making of a workable vaccine, competent to make antibodies against a tolerant molecule to the woman’s immune system (she literally bathes in hCG during pregnancy) was not simple. What was also demanded was high immunogenicity of the vaccine to make fairly high titres of antibodies to counteract the large amount of hCG made in early pregnancy. At each stage, it required testing in humans and before that could be done, appropriate toxicology studies & approval of Regulatory and Ethics Committees was needed each taking its time. Eventually the vaccine has to be amenable to industrial production to reach the public, hence a recombinant vaccine had to be developed. Given below is a brief write-up on the evolution of the vaccine against the human chorionic gonadotropin.
Yours, Pran
 
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