Pregnancy - way Down Syndrome Trisomy 21 Non-disjunction of...

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1 Outline Pregnancy New Organs Trimesters Teratogens Fetal conditions Parent - Child Relationship Prenatal Development New Organs from Pregnancy Amnion Amniotic Fluid Placenta Chorion Umbilical Cord 3-day old human embryo on a pin (Smithsonian, 2005)
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2 Trimesters First Trimester (weeks 1- 12) major organs Second Trimester (weeks 13 - 26) continued development viability of fetus Third Trimester (weeks 27 - 40) weight gain lung development
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3 Fourteen Weeks Female at 20 weeks Male at 8 months
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4 Teratogens Environmental agents that cause abnormalities Effects vary with timing of the exposure Not all organisms are effected in the same
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Unformatted text preview: way Down Syndrome Trisomy 21 Non-disjunction of 21st chromosome Non-invasive prenatal tests Ultrasound Test mothers blood for alpha feto-protein Invasive prenatal tests Goal: fetal karyotype Amniocentesis Chorionic Villus Sampling Karyotype http://www.genome.gov/Pages/News/Photos/Other/karyotype_black_image.jpg 5 Parent - Child Relationship Logistics of birth Neotony Bonding Outline Pregnancy New Organs Trimesters Teratogens Prenatal tests Parent - Child Relationship...
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Pregnancy - way Down Syndrome Trisomy 21 Non-disjunction of...

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