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Pregnancy and Childbirth
from the beginning to the excrutiating pain
62
Anatomy
Undergraduate 2
02/20/2009

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Term
The three periods of prenatal development
Definition
The three periods are the Germinal, the Embryonic, and the Fetal
Term
Germinal Period
Definition
This period is the first 2 weeks of development during the formation of the primitive germ layers
Term
Embryonic period
Definition
The period between the 2nd-8th week in which organ systems develop
Term
Fetal period
Definition
The last 30 weeks of the prenatal develpment in which organ systems grow and mature
Term
Clinical age and the Estimated Date of delivery
Definition
=LMP+7 days+ 9 months
Term
Zygote
Definition
This is the fertilized egg
Term
Pluripotent
Definition
The ability to develop into a wide range of tissues
Term
Morula
Definition
A solid ball of 12 or more cells
Term
Blastocele
Definition
The hollow ball of cells
Term
Functions of the Placenta
Definition
This provides nourishment to the embryo, allows for gas exchange, removes waste, and produces HCG which maintains the corpus luteum
Term
Chorion
Definition
This is the fetal part of the placental structure and contains the syncytiotrophoblasts and embryonic capillaries
Term
Amniotic sac
Definition
This is the fluid filled space around the embryo
Term
Germ Layers
Definition
Ectoderm,Mesoderm, and Endoderm layers
Term
Yolk Sac
Definition
This is the site of formation of the first blood cells and the cells that will become spermatogonia and oogonia
Term
Neural tube
Definition
This is what the brain and spinal cord comes from
Term
Neuroectoderm cells
Definition
these cells form the brain, spinal cord, the PNS, the adrenal medulla, melanocytes, some parts of the head (parts of the skull, dentin of teeth, connective tissue)
Term
Somitomeres
Definition
These are cells that become part of the skull, the vertebral column and skeletal muscle
Term
Hindgut/Foregut
Definition
The tube structure of the embryo
Term
Oropharyngeal membrane
Definition
This is part of the foregut that becomes the mouth
Term
Cloacal membrane
Definition
This part of the hindgut that becomes the anus and urethral opening
Term
Allantois
Definition
This is the evagination that becomes the bladder
Term
Branchial arches
Definition
These are solid bars of tissue that form along the lateral surface of the head and cause pouches to form
Term
What form from the Pharyngeal Pouches?
Definition
Auditory tubes, tonsils, the thymus, and the parathyroids form from these
Term
Limb bud
Definition
This is how the appendages form
Term
Structures that form the face
Definition
The Frontonasal process, Maxillary processes, and the Mandibular processes and the Nasal placodes.
Term
Ectoderm
Definition
This is what the Epidermis is derived from
Term
Mesoderm
Definition
The dermis and neural crest cells are derived from this.
Term
How does the heart form?
Definition
This is formed from 2 tubes that fuse together and then change shape
Term
Respiratory System
Definition
This forms from a single mid-line evagination from the foregut in the region of the future esophagus
Term
The Urinary System develops from which germ layer?
Definition
The mesoderm develops into this system that gets rid of waste
Term
Kidney development - 3 steps
Definition
The pronephros, the mesonephros and metanephros are steps to develope this
Term
Gonadal ridges
Definition
These are what the male and female gonads develope from
Term
Lanugo
Definition
This is fine hair that covers the fetus
Term
Vernix Caseosa
Definition
This is a waxy coat of sloughed epithelial cells that protect the fetus from the embryonic fluid
Term
Parturition
Definition
This is the process of birth
Term
What hormones are involved in the mother for parturition?
Definition
Estrogens (overcome the influence of progesterone) and oxytocin
Term
First Stage of Labor
Definition
This is the stage of labor that regular uterine contractions begin and the cervix dialates fully
Term
2nd stage of labor
Definition
This is the stage of labor that starts when the cervix completely dialates until the baby exits the vagina
Term
Third stage of labor
Definition
This is the stage of labor that the placenta is expelled from the uterus
Term
How the Hormones are used in Parturition
Definition
1)The baby is stressed causing ACTH from the fetal pituitary to release
2)the ACTH causes Estrogen and prostaglandin synthesis to increase
3)The fetus causes the uterus to stretch
4)The uterine stretch stiumlates the maternal pituitary to release oxytocin
5)The oxytocin and estrogen causes uterine contractions
Term
Foramen Ovale
Definition
This structure is located between the baby's atria and is closed after birth
Term
Ductus arteriosus
Definition
This structure is located between the baby's pulmonary trunk and aorta and closes after birth
Term
Meconium
Definition
This is the discharge of cells from the digestive tract, amniotic fluid, bile and mucus that is excreted by the newborn
Term
Newborn Baby Assessment
Definition
APGAR: Appearance, Pulse, Grimace, Activity, Respiratory effect ; scaled from 0-2
Term
Prolactin
Definition
The hormone that causes milk production
Term
Colostrum
Definition
The initial secretion from the breasts that is low in fat and lactose
Term
What causes the closure of the Ductus arteriosus?
Definition
An increase in oxygen during the first breath causes this to close
Term
What closes the closure of the foramen ovale?
Definition
The decrease in resistane in the pulmonary vasculature causes the left atrial pressure to increase more that the right atrial, therefore, closing this structure
Term
The fetus is most susceptible to teratogens during what time?
Definition
During the 3rd-8th week the fetus is susceptible to this
Term
The Mesoderm layer derives these:
Definition
Urogenital structures, blood, bone, muscle
Term
Spermatogenesis takes this long:
Definition
It takes 2 months for this process to complete in males
Term
How many arteries and veins does the umbilical cord contain?
Definition
This contains 2 arteries (caring deoxygenated blood away from) and 1 vein(bring oxygenated to) the fetus
Term
The primary spermatocyte is haploid or diploid?
Definition
This spermatocyte is diploid
Term
The secondary spermatocyte is haploid or diploid?
Definition
This spermatocyte is haploid
Term
Ligamentum arteriosum
Definition
This is the structure that the ductus arteriosus forms after it closes
Term
Fossa ovalis
Definition
This is what the foramen ovale becomes after it closes
Term
Septum Secundum
Definition
The second of two major septal structures of the atrium that arises second.
Term
Embryonic Disk
Definition
The point in the inner cell mass at which the embryo begins to be formed
Term
Bulbus Cordis
Definition
End of the embryonic cardiac tube where blood leaves the heart; becomes part of the ventricle
Term
Mesenchyme
Definition
The cells that are derived from the neural crest or mesoderm of the embryo
Term
What does the levels of estrogen and progesterone do after parturition?
Definition
Estrogen and Progesterone levels fall dramatically after this event.
Term
What hormone is responsible for the growth of breast alveolar during pregnancy?
Definition
Progesterone is responsible for this change in the breast during pregnancy.
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