OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
WEEK 1 OB STUDY GUIDE
Genetics and the Childbearing Family
• Genes
Genome: complete set of DNA
Genotype: Refers to a persons genetic makeup
Phenotype: refers to how the genes are outwardly expressed ( eye color,
hair color, height)
• Dominant inheritance & Recessive inheritance: Genes are either dominant or recessive.
When there is both a dominant and a recessive gene in the pair, the trait of the dominant
gene are present. The traits of the recessive gene are present whe both genes of the pair
are recessive. Genetic diseases are usually related to defective recessive gene and present
in the developing human when both pairs of the gene have the same defect. A person
who has only one recessive gene for a disorder is known as a carrier and does not present
with the disorder. Genetic disorders related to a dominant gene are rare.
• Sex-linked inheritance: AKA X- linked inheritance or traits. These are genes or traits
only located in the X chromosome. They can be either recessive or dominant. The Y
chromosome does not have the corresponding genes for some of the X chromosomes
genes. Female children who have one X chromosome with a sex linked trait disorder do
not present with the trait, but are carriers. Male child with X chromosome with a disorder
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
,OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
of one or more of its genes presents with the disorder when the Y chromosome does not
carry that gene; the gene, even though it may be recessive, becomes dominant.
• Genetic disorders
recessive defects: Sickle cell anemia, cystic fibrosis, Tay-Sachs (fatal genetic
disorder) Important in preconception.
Sex-linked:
X-linked hemophilia, Duchenne muscular dystrophy, some HTN
problems, fragile –X syndrome, congenital night blindness, G6PD
deficiency, and the most common human genetic disorder red-green
color blindness.
Y-linked: may leads to infertility – male pattern baldness
Genetic Testing
• Advanced maternal age, geriatric pregnancy +35 years old ( Down syndrome risk).
• Previous pregnancy and had baby with genetic disorder.
• One or both parents have any genetic disorders or family history.
• Triple screen done for down syndrome and neural tube defects done on every mother.
• Parents decision to terminate our job is just to support NEVER GIVE OPINION.
Teratogens
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
,OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
• Teratogenic agents ( can cause any fetal abnormality): defined as any drugs, viruses,
infections, or other exposures that can cause embryonic/detal developmental
abnormality.
• Birth defects can orccur from genetic disorders or be result of teratogen exposure.
• The developing human is most vulnerable to the effects of teratogens
during organogenesis, which occurs during the first 8 weeks of gestation.
• Exposure after 13 weeks can cause fetal growth restriction or reduction of organ size.
• *** CLASS NOTES
Drugs
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
, OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
Alcohol: microcephaly, cardiac problems, mental retardation, unusual facial
features. (NOT SAFE TO DRINK WHILE PREGNANT EVEN ONE DRINK PER
DAY).
Most vulnerable time is first 8 weeks.
Infections/viruses: Rubella- prenatal lab check for rubella it can cause blindness,
deafness, mental retardation, and fetal demise. If mom is not immune cannot give
vaccine because it is live virus. Prenatal not immune give before and after can have
low grade fever.
• Ace inhibitors: IUGR, renal problems.
• Cocaine- cerebral infarction (stroke), placental abnormalities.
• Smoking- IUGR ( oxygen deprivation, baby is not getting enough oxygen and nutrition)
Menstrual Cycle
• Ovarian cycle: Maturation of ova and consists of three phases.
Follicular phase: begins on first day of menstruation and lasts 12-14 days. The
graafian follicle is maturing under the influence of two pituitary hormones LH and
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
WEEK 1 OB STUDY GUIDE
Genetics and the Childbearing Family
• Genes
Genome: complete set of DNA
Genotype: Refers to a persons genetic makeup
Phenotype: refers to how the genes are outwardly expressed ( eye color,
hair color, height)
• Dominant inheritance & Recessive inheritance: Genes are either dominant or recessive.
When there is both a dominant and a recessive gene in the pair, the trait of the dominant
gene are present. The traits of the recessive gene are present whe both genes of the pair
are recessive. Genetic diseases are usually related to defective recessive gene and present
in the developing human when both pairs of the gene have the same defect. A person
who has only one recessive gene for a disorder is known as a carrier and does not present
with the disorder. Genetic disorders related to a dominant gene are rare.
• Sex-linked inheritance: AKA X- linked inheritance or traits. These are genes or traits
only located in the X chromosome. They can be either recessive or dominant. The Y
chromosome does not have the corresponding genes for some of the X chromosomes
genes. Female children who have one X chromosome with a sex linked trait disorder do
not present with the trait, but are carriers. Male child with X chromosome with a disorder
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
,OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
of one or more of its genes presents with the disorder when the Y chromosome does not
carry that gene; the gene, even though it may be recessive, becomes dominant.
• Genetic disorders
recessive defects: Sickle cell anemia, cystic fibrosis, Tay-Sachs (fatal genetic
disorder) Important in preconception.
Sex-linked:
X-linked hemophilia, Duchenne muscular dystrophy, some HTN
problems, fragile –X syndrome, congenital night blindness, G6PD
deficiency, and the most common human genetic disorder red-green
color blindness.
Y-linked: may leads to infertility – male pattern baldness
Genetic Testing
• Advanced maternal age, geriatric pregnancy +35 years old ( Down syndrome risk).
• Previous pregnancy and had baby with genetic disorder.
• One or both parents have any genetic disorders or family history.
• Triple screen done for down syndrome and neural tube defects done on every mother.
• Parents decision to terminate our job is just to support NEVER GIVE OPINION.
Teratogens
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
,OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
• Teratogenic agents ( can cause any fetal abnormality): defined as any drugs, viruses,
infections, or other exposures that can cause embryonic/detal developmental
abnormality.
• Birth defects can orccur from genetic disorders or be result of teratogen exposure.
• The developing human is most vulnerable to the effects of teratogens
during organogenesis, which occurs during the first 8 weeks of gestation.
• Exposure after 13 weeks can cause fetal growth restriction or reduction of organ size.
• *** CLASS NOTES
Drugs
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
, OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
Alcohol: microcephaly, cardiac problems, mental retardation, unusual facial
features. (NOT SAFE TO DRINK WHILE PREGNANT EVEN ONE DRINK PER
DAY).
Most vulnerable time is first 8 weeks.
Infections/viruses: Rubella- prenatal lab check for rubella it can cause blindness,
deafness, mental retardation, and fetal demise. If mom is not immune cannot give
vaccine because it is live virus. Prenatal not immune give before and after can have
low grade fever.
• Ace inhibitors: IUGR, renal problems.
• Cocaine- cerebral infarction (stroke), placental abnormalities.
• Smoking- IUGR ( oxygen deprivation, baby is not getting enough oxygen and nutrition)
Menstrual Cycle
• Ovarian cycle: Maturation of ova and consists of three phases.
Follicular phase: begins on first day of menstruation and lasts 12-14 days. The
graafian follicle is maturing under the influence of two pituitary hormones LH and
OB NURS 306 WEEK1 OB-GENETICS AND THE
CHILDBEARING FAMILY STUDY GUIDE 2022/2023 UPDATE
GRADED A+
