ART Stats Flashcards
What entails assisted reproductive technology?
All fertility treatments in which both eggs and sperm are handled (outside of body)
Why can an cycle be cancelled?
- Poor ovarian response
- Illness
- Other reason
Why can a transfer be cancelled?
- Poor uterine lining development
- Poor embryo development
- Illness
- Desire to bank
Out of the 413,776 cycles that were started in 2021, what percent resulted in clinical pregnancy?
27% (112,088)
Chemical pregnancy
Positive hCG blood test at 4 weeks gestation (measured from last menstrual period)
Clinical pregnancy
- Chorionic sac is present at 5-7 weeks
- Detection of heartbeat at 7 weeks
Out of the 413,776 cycles that were started in 2021, what percent of the clinical pregnancies (112,088) resulted in a live birth?
82% (91,906)
- About 16% resulted in miscarriage
When do most miscarriages occur?
Prior to 14 weeks
Transferring 2 embryos increase live births by…
6.2% but increase the chance of twins by 39.2
How does maternal age affect the multiple birth rate?
FSH increases with age, which can increase the rate of dizygotic twins
In the US, the increase in twinning rate between 1970 to 2005 is due to a combination of?
- 72% non-ART and IVF
- 28% delayed childbirth/increased maternal age
Complications of multiple gestation - preterm birth
Occurs in 50% of twin, 90% of triplet, and all quadruplet pregnancies
Complications of multiple gestation - death within 1 month of birth
- 7x more likely for twins
- 20x more likely for triplets
Complications of multiple gestation - prematurity
Increased risk of respiratory distress syndrome, intracranial hemorrhage, cerebral palsy, and blindness
Lifelong disability is over _____% for babies weighing less than 1000 grams
25%
