And it's not, I have to admit it's not an abortifacient, Your Honor.158 Medical Meaning That conception begins at fertilization is not bereft of medical foundation. Mosby s Medical, Nursing, and Allied Health Dictionary defines conception as "the beginning of pregnancy usually taken to be the instant a spermatozoon enters an ovum and forms a viable zygote." 159 It describes fertilization as "the union of male and female gametes to form a zygote from which the embryo develops."160 The Textbook of Obstetrics (Physiological & Pathological Obstetrics),161 used by medical schools in the Philippines, also concludes that human life (human person) begins at the moment of fertilization with the union of the egg and the sperm resulting in the formation of a new individual, with a unique genetic composition that dictates all developmental stages that ensue. Similarly, recent medical research on the matter also reveals that: "Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (conception). Fertilization is a sequence of events that begins with the contact of a sperm (spermatozoon) with a secondary oocyte (ovum) and ends with the fusion of their pronuclei (the haploid nuclei of the sperm and ovum) and the mingling of their chromosomes to form a new cell. This fertilized ovum, known as a zygote, is a large diploid cell that is the beginning, or primordium, of a human being."162 The authors of Human Embryology & Teratology163 mirror the same position. They wrote: "Although life is a continuous process, fertilization is a critical landmark because, under ordinary circumstances, a new, genetically distinct human organism is thereby formed.... The combination of 23 chromosomes present in each pronucleus results in 46 chromosomes in the zygote. Thus the diploid number is restored and the embryonic genome is formed. The embryo now exists as a genetic unity." In support of the RH Bill, The Philippine Medical Association came out with a "Paper on the Reproductive Health Bill (Responsible Parenthood Bill)" and therein concluded that: CONCLUSION The PMA throws its full weight in supporting the RH Bill at the same time that PMA maintains its strong position that fertilization is sacred because it is at this stage that conception, and thus human life, begins. Human lives are sacred from the moment of conception, and that destroying those new lives is never licit, no matter what the purported good outcome would be. In terms of biology and human embryology, a human being begins immediately at fertilization and after that, there is no point along the continuous line of human embryogenesis where only a "potential" human being can be posited. Any philosophical, legal, or political conclusion cannot escape this objective scientific fact. The scientific evidence supports the conclusion that a zygote is a human organism and that the life of a new human being commences at a scientifically well defined "moment of