The argument that a human being starts to exist at conception is really a definition, not an argument.
It's what the word "conception" means. 🧵1/11
It's what the word "conception" means. 🧵1/11
Conception is what happens when a sperm meets and fertilizes an egg.
That's it. 2/11
That's it. 2/11
Etymologically, conception means to become pregnant; to take in and hold;
for example, the mind taking in an idea, or an egg taking in a sperm. 3/11
for example, the mind taking in an idea, or an egg taking in a sperm. 3/11
This makes sense, because conception = fertilization.
Apart from in vitro fertilization, conceptional age is impossible to know, but the standard estimate is 2 weeks after the first day of your last menstrual period (LMP). 4/11
my.clevelandclinic.org/health/article…
Apart from in vitro fertilization, conceptional age is impossible to know, but the standard estimate is 2 weeks after the first day of your last menstrual period (LMP). 4/11
my.clevelandclinic.org/health/article…
That's because ovulation happens at around week 2 in a standard 4-week menstrual cycle, and fertilization can only happen within a few days after ovulation.
Actual age: embryologic = conceptional = ovulatory = fertilizational = developmental
Actual age + 2 wks = gestational age
Actual age: embryologic = conceptional = ovulatory = fertilizational = developmental
Actual age + 2 wks = gestational age
Gestational age (GA) is measured from LMP,
but gestation--fetal development--begins at conception and ends at live birth. 6/11
. medlineplus.gov/ency/article/0…
but gestation--fetal development--begins at conception and ends at live birth. 6/11
. medlineplus.gov/ency/article/0…
Conception = fertilization = "fusion of an egg and a sperm" = the start of a human being = the beginning of pregnancy. 7/11
evolve.elsevier.com/cs/product/978…
evolve.elsevier.com/cs/product/978…
Conception = fertilization = "fusion of an egg and a sperm" = the start of a human being = zygote = the beginning of pregnancy = the beginning of a child 8/11
"Conceptus" is another name for a zygote ("fertilized egg"), embryo, or fetus.
Ironically, the disdainful, unscientific, nonmedical epithet "ZEF" (zygote-embryo-fetus) acknowledges that human life begins with fertilization, which is conception. 9/11
Ironically, the disdainful, unscientific, nonmedical epithet "ZEF" (zygote-embryo-fetus) acknowledges that human life begins with fertilization, which is conception. 9/11
Conception is a scientific, medical concept, not a philosophical or religious one.
Some people think there's such a thing as "ensoulment," just as some think there's an onset of "personhood." These are philosophical arguments.
Conception is a definition.
publications.aap.org/pediatrics/art…
Some people think there's such a thing as "ensoulment," just as some think there's an onset of "personhood." These are philosophical arguments.
Conception is a definition.
publications.aap.org/pediatrics/art…
The beginning.
11/11
11/11
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