EMBRYOLOGY

Janet J. Nelson RN

Rarest Footage of Fetal Development

• http://www.ehd.org/playlist-movies.php?list=5

ACROSOME

ACROSOME destroys Corona Radiate

Contact with Zona Pellucida=Fertilization

EMBRYO DEVELOPMENT 1

Zona pellucida

CLEAVAGE

Morula

BLASTOCYST

EMBRYO DEVELOPMENT 2

• http://www.ehd.org/movies.php?mov_id=5

• View each of the slides in 0-2wk• http://www.ehd.org/science_main.php?level=

i (view movie the first week and

CLEAVAGE

MORULA- DAY 2

IMPLANTATION-Day 8 Notice the chorionic villi

PLACENTA & UMBILICAL CORD

ECTOPIC PREGNANCY

• 9-Week Human Embryo from Ectopic Pregnancy

Teratogen

In the Iate 1950s a German company launched thalidomide, marketed as a cure for morning sickness . Many fetal deaths resulted and a large range of disabilities, typically short limbs and flipper-like arms as well as deafness and blindness.

FAS

• http://www.nofas.org/wp-content/uploads/2012/10/NOFAS-FASD-What-Everyone-Should-Know-2012.pdf

• S&S• http://www.nofas.org/wp-content/uploads/

2012/05/identification.pdf

Folic Acid

• http://www.marchofdimes.com/pregnancy/folicacid.html

AMNIOTIC SAC AND UMBILICAL CORD

UMBILICAL CORD

AMNIONIC SAC

FINGERS AND TOES

FIRST TRIMESTER

Week 4-6

• http://www.ehd.org/movies.php?mov_id=8

Vernix Caseosa

What is the function of Vernix Caseosa?

LANUGO

• This soft prenatal hair is called lanugo hair. Most of the time, most of this hair is shed during the 7th or 8th month of pregnancy. Sometimes it is still present for a few months after birth, especially in babies born early.

Effacement

The cervix effaces and thins out in the final weeks of pregnancy. As labor progresses the cervix dilates from 0 centimeters to 10 centimeters

Engagement or LighteningThis is the fetus descending into the lower pelvis. Mom will feel an increased pressure in the lower abdomen and notice that the baby is gradually dropping. Mom is relieved to find it much easier to breath.

Early Stage I

• This is usually the longest phase of labor. However, contractions tend to last less than a minute with five or more minutes between contractions. These contractions thin and begin to open the cervix. Most women maintain normal activity

Active Stage IDuring this phase, the cervix dilates from four to seven centimeters. Women are more actively involved in the work of labor. Contractions grow progressively stronger and longer during this time, lasting 40-60 seconds or more and coming every two to five minutes.

Transition• Transition:This is

usually the hardest phase of the first stage of labor, but often the shortest. This phase completes dilation of the cervix to 10 cm. Contractions are very intense, lasting 60-90 seconds and occurring as close as every two minutes.

• Crowning occurs.

Episiotomy

BREECH Presentation

Placenta Delivery

TWINS

Fraternal twins develop when two eggs are fertilized by two sperm.

Identical twins are formed from one fertilized egg that splits into two identical halves after conception.

AMNIOCENTESIS

CHORIONIC VILLUS SAMPLING