Appendix 1
The Chronological Development of The Unborn Child


At Conception



An embryo, or a new human, comes into existence
when a zygote is produced at fertilization by the
combination of a sperm with an ovum.
At conception Moore, p 2
The sperm has 23 chromosomes and so does the
ovum, but the zygote has 46 chromosomes.
Although half of its chromosomes come from
each parent, the zygote is genetically different than
either of them, and is, in fact, genetically unique.

At fertilization Moore, p 37

The sex of the embryo is determined genetically.

At fertilization Sadler, p 319
Genetic sex is established.
At fertilization Williams,
p 180
The embryo's chromosomal sex is determined.
At fertilization Moore, p 37
The difference between a male and a female is
determined genetically at the time of conception

At conception Rugh, p 7


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