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1ST OB TEST
| Question | Answer |
|---|---|
| Appearance of the placenta before 8weeks | Chorionic sac is covered by villi that is seen as general thickening around GS |
| Appearance of the placenta after 8weeks | Villi leave,regress will look smooth, avascular area known as chorion leave |
| Smooth homogeneous echo pattern, within 1st trimester | Grade 0 |
| More calcification and indentions of chorionic plate, basal plate calcification" where uterus/placenta attate" | Grade 2 |
| Many calcification, chorionic plate calcified.Basal plate calcifed, deeper indentions of chorionic plate which divided the lobes of placenta | Grade 3 ( should not be seen before 3wks) |
| Comes out in front of baby,baby depends on this for oxygen so it needs to be behind the baby | Placenta Previa |
| List some of the symptoms of placenta previa | Painless vaginal bleeding in 2nd or 3rd trimester. Most common with multipile pregnancy,uterine surgery and previous previa |
| List the four types of placenta previa | Symmetrical, asymmetrical, marginal, low-lying |
| Totally covers internal cervical Os, volume is some what equal on both sides | Symmetrical |
| Totally covers the Os, completly on one side of uterus | Asymmetrical |
| Tip extends into Os | marginal |
| Within 2 cm of Os | Low-lying |
| If you diagnose previa to early does it have the potential to change? | Yes, not before 3rd trimester due to uterus still stretching |
| What percent of previa is misdiagnosed at 2nd trimester | 72% |
| Pulls away from uterin wall before delivery no longer gives oxygen and nutrents. | Placenta Abruption |
| Increase in BP, vascular disease, type one diabetes, smoking, drugs, fibroids, truma, malformation of previous abruption are all some causes for | Placenta Abruption |
| Name three classes of Placenta Abruption | Subchorionic,retroplacenta and marginal |
| Most common before 20 weeks, no bleeding, fetal death due to cord compression | Subchorionic abruption |
| Behind or beneath placenta with possible bleeding | retroplacenta |
| Subchorionic, involves placenta, margin of basal side and will bleed | marginal |
| What is the normal thickness of Placenta | Thickness corresponds to menstrual age. 20wk - 20mm; 26wk - 26mm; 40wk - 40mm. Should never be 40mm or 4cm |
| List some symptoms of Abruption | Vaginal bleeding at 3rd trimester, tense hard painless uterus, fetus may have IUGR, pain if trauma involved, thick placenta |
| Abnormal adherence of all or part of Placenta,chorionic villi grow into the myometrium and ville anchored to muscle fibers instead of decidual cells | Placenta Accreta |
| List three types of Placenta Accreta | Accreta, Increta, Percreta |
| Placenta extends through myometrium | Increta |
| Placenta invades into uterine wall and may extend through the uterine wall into bladder | Percreta |
| What type of treatment is there for Placenta accreta | Hysterectomy after delivery due to infection |
| How long is term pregnancy | 280 days |
| Where does fertilization occur | ampullary portion |
| When does embryo first become a blastocyst | 4 to 5 days post fertilization |
| What are the two part of fetal components of placenta | Chorian fondosa and Decidua |
| What is the most correct measurment in first trimester | CRL |
| Parts of the chorion | Frondosum and Laeve |
| Part that invades the Endo, portion of chorion that developes into fetal portion of placenta. Together w/Decidua form maternal/fetal circulation | Chorion Frondosum |
| Not in Contact with the decidua basalis. Degenerates at eight weeks, villi leave and a smooth chorion is left around GS | Chorion Laeve |
| Covered by villi, two layers of trophoblast form it and fetal component of placenta implant into materal endo | Chorion |
| Part of maternal endometrium, maternal component of placenta and thick endo | Decidua |
| Name three parts of the Decidua "Double decidua sign" | Basalis, Capsularis, and Parietalis |
| Anchors placenta, trophoblast (chorion) dig into it? Villi on maternal side; unites w/chorion to form placenta. Reaction between blastocyst & myometrium | Decidua basalis |
| Part of decidua that covers blastocyst closer to endo | Decidua Capsularis |
| Remaining portion of decidua around endo | Decidua Parietalis or vera |
| Moura enters uterus bounces around looking for a place to implant while picking up fluid than it's called | Blastocyst |
| Blastocyst cells divides into? | Outer and Inner cell mass |
| Composed of trophoblast which becomes the fetal component of placenta | Outer cell mass |
| Becomes the embryo, amnion, cord and secondary yolk sac | Inner cell mass |
| Clinical dating, add 7 days and 9 mon to 1st day of LMP | Nyegeles Rule |
| What is the EDC of the Pt if the LMP was 2/15/99 | 11/22/99 |
| What is the most common type of cyst in a normal pregnancy? | Corpus Luteum cyst |
| What is the function of the Yolk Sac | Hemopoiesis ( makes blood) Dev sex gland Formation of digestive tube Transfer of nutrients |
| What is another name for the yolk sac | Heuser membrane |
| What is it called if the yolk sac does not detach? | Meckel Diverticulum |
| What is the location of the embryo | Between primary YS and amniotic cavity |
| Came from chorionic fluid three week post fertilization | Gestational sac |
| Ovum is fertilized by sperm in the | Ampullary portion of the tube |
| Will not allow anymore sperm to enter | Zona pellucida |
| Is created by this fertilization | Zygote |
| Carry genetic material | Chromosomes |
| Line up and split longitudinally 24 hr post fertilization | Cleavage |
| After cleavage one cell divides into two | Blastomeres |
| Blastomeres further divide into | 12 to 16 cells |
| 3 days post fertilization this ball of cells enters the uterus | Morula |
| Morula enters the uterus picking up fluid and becomes | Blastocyst |
| Blastocyst begins to seperate into | Outer cell mass composed of Trophblast and Inner cell mass that give rise to 2nd YS, amnion, cord and embryo |
| Day 7 or 2 days after | Blastocyst implants |
| 7 to 10days | Positive hCG blood pregnancy test |
| 3 weeks post fertilization | Gestational sac |
| At 8 weeks | Embryo is now fetus |
| 5 days post fertilization | Fetal Components |
| The yolk sac is first seen at | 5 week gestation and should be less than 6mm |
| The heart starts to beat at | 6th week |
| The two membranes of pregnancy are | Chorion and amnion |
| By the end of the 1st week post fertilization the embryo of blastocyst is termed a | hypoblast |
Created by:
yovana2011
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