Lifesite
"The very moment a male sperm cell penetrates a female egg cell, a new human life comes into being. This event, known as fertilization, forms a tiny, single-celled human distinct from his or her mother mother.
This little life is called a zygote, meaning “yoked or joined together.”1 It's the living seed that will be a newborn baby in nine months’ time.
The zygote’s DNA has its own set of chromosomes and genetic blueprint with data such as whether it’s a boy or a girl, which parent she’ll resemble more, and what color her eyes will be. The information in this one cell is so vast it would take 1.5 million pages to write out!2
The new life is also so small - less than 1/15th the size of a pinhead3 - it can barely be seen by the naked eye. But it packs a punch: it will grow to one billion cells with 4,000 distinct anatomic structures in only 8 weeks.4
Days 4-12 - Embryo implants in mother's uterus
By day four the zygote has left the fallopian tube and entered the uterus, where it can benefit from the nutrients its mother will provide.
Because the new life is so genetically distinct, it must release a special protein to prevent a defensive response by the mother’s immune system. Then the embryo can implant in the uterine lining,5 where the lifeline between mom and baby begins to form. This process is complete by day twelve after fertilization.6
The embryo also produces a hormone called human chorionic gonadotropin (hCG) about eight days after fertilization. This hormone brings the menstrual cycle to a halt, allowing the pregnancy to continue. Present in the mother’s blood and urine, hCG is the substance detected in most pregnancy tests." . . .
. . . Week 20-22 - Baby begins to respond to sound . . .
. . . Week 23 - Baby can learn and remember . . .
. . . "Third Trimester " . . . Able to hear before birth, the fetus becomes highly familiar with the sound of his mother’s voice. So much so that the newborn baby, studies demonstrate, prefers her voice to others. The newborn also prefers “female voices to male voices and familiar lullabies heard before birth to new lullabies after birth.”42
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