lecture 6 Flashcards
Does sex have any correlation with self esteem?
Yes, sexual self esteem is related to overall self esteem
Key points in fertilization and implantation
Ovulation, Fertilization occurs 12-24 hours after ovulation
~You can get pregnant in larger window than 12-24 hours bc sperm lives longer (48 hours to 8 days)
Sperm follow the chemical signal of the egg
~Around one teaspoon of ejaculate is released (200 million-400 million sperm in teaspoon)
~Sperm swim 1-3 cm per hour
~Egg secretes chemical that attracts sperm
Zona Pellucida
thin gelatinous layer around egg that protects the egg
Hyaluronidase:
enzyme secreted by sperm that swarms the egg that helps to dissolve the zona pellucida
Permits one sperm to penetrate the egg
Capacitation
penetration of one sperm to egg
~Once one sperm penetrates the egg, the zona pellucida layer around egg hardens so no other sperm can come in
Implantation
fertilized egg (zygote) down fallopian tube towards the uterus for implantation (around 5 days)
Cell division takes place in 5 days
Obstacles to fertilization
Acidity of vagina: acidity of vagina
Some sperm are deformed
Sperm swimming against currents of fallopian tube
Sperm has to swim against the cilia
Some sperm swim up wrong fallopian tube
If Sperm passes by obstacle
Zygote is formed -fertilized egg
1)Travels down fallopian tube
2)Cell division begins ~36 hours after conception
4)Implantation occurs 5-7 days later in uterus
5)embryo 2-8 weeks
6)fetus: after 8 weeks
Improving chances of conception
Tracking ovulation by basal body temperature
~Basal body temp is slightly lower right before ovulation and slightly higher right after
Time intercourse right at ovulation or 1-2 days before
Maintain sperm count: have sperm ejaculate 2-3 times during week of ovulation
~Sperm count is lower if you have sex everyday
~If you wait between 2-3 days of having sex, sperm count is higher
Gravity
Presumptive signs of pregnancy
missed period, breast tenderness, nausea, more frequent urination, fatigue
Missed period +2 other symptoms= 67% probability of pregnancy
Probable signs:
80-95 % correct of pregnancy
HCG: released by placenta thats detected by at home pregnancy tests
Hegar’s sign: softening of lower uterus (around week 7)
Positive signs: def pregnant
Fetal heartbeat, fetal movement
Nagele’s rule (calculates due date):
Take first day of missed period subtract 3 months +1 week + 1 yr
due date is confirmed after 9 weeks from ultrasound
Emotional reactions to pregnancy
Positive emotions:
Hope to be a parent, excitement and anticipation
Characteristically optimistic adapt well
Sense of wonder
Pregnancy as transition into adulthood
Social support correlated with psychological and physical well being
Negative emotions
Fears, anxieties, concerns about pain of childbirth
Declining body image
Worry about health
Lack of an identity (besides being “pregnant person”)
Pregnancy during stressful events
Increased low birth
What changed for expectant mothers during COVID-19:
Boredom, lonely,
Change of birth plan
Decreased income, change of employment
rise in depression
Pregnant people who had covid:
Increase in placentia (placenta doesn’t grow normally)
Preterm birth/ still birth was more likely
Impact of maternal prenatal stress related to covid-19:
Similar to other stressful events
Stressful events are very negatively impactful to fetus born during covid-19
1st Trimester
first 12 weeks
Major organs of fetus already developing quickly
Most rapid fetal development
Physical changes in pregnant person:
1st trimester
Breast swelling
Frequent urination
Bowel irregularity: hormones have impact on digestion
Vaginal discharge
Nausea: related to higher HCG levels
Fatigue
Miscarriages
Preterm delivery
Estimated up to ½ of all fertilized eggs are lost before person knows they are pregnant
15-20% of people who know they are pregnant experience miscarriage
Most caused by chromosome problems in fetus (mainly genetic issue)
Other possible causes:
Hormones, drug use, serious disease in pregnant person (rare)
Risk of miscarriage increases with age
Beginning by 30, greater between 35-40 (geriatric pregnancy), highest after 40
Possible symptoms of miscarriage:
Low back or abdominal pain
Clot passes through vagina
Vaginal bleeding
Treatment of miscarriage
Important to be examined to ensure no tissue remaining in uterus
Prevention of miscarraige
Early prenatal care
Detect and treat illness
Avoid environmental hazards
Psychological effects of miscarriage
50% of pregnant people suffer elevated levels of anxiety, depression, and grief
Risk factors of psychological effects:
History of psychiatric illness
Childlessness (people who don’t have children already)
Lack of social support
Poor relationship adjustment
Prior pregnancy loss
2nd trimester=weeks 13-26
Chances of miscarriage decrease a lot
Physical changes in pregnant person
Decreased symptoms
Constipation,nosebleeds
Expanding belly
Fetal movements
Edema (water retention)
Breasts fully developed (colostrum)
Psychological changes in pregnant person:
Calm, well being, pride, excitement, maternal responsiveness
3rd trimester= weeks 27 to 38
Physical changes in pregnant person:
Uterus is large and hard
Symptoms from pressure on organs
Aware of fetal activity
~Kicking belly
Awkwardness
~Balance is affected
~Gaining of weight
Braxton-hicks contractions
~Uterus contracts to prepare for pregnancy
Engagement of head
~Pressure in pelvis, head moves to bottom of uterus
Psychological changes in pregnant person
3rd trim
Impatience, concern re: health of baby and delivery
How frequent to Braxton Hicks contractions get as you approach labor?
Varies person to person but usually lasts 30 seconds
Often changes with different positions
Impact of media portrayal of pregnancy
Increased display of pregnant bodies
positive regard and acceptance of pregnant belly