Midterm 2 (Ch 7, 8, 9, 13, 14) Flashcards
Ancient forms of birth control
- silphium was a plant used in ancient Greece
- deadly substances like mercury and arsenic used
- tampons and other things inserted before sex
- sent girls away when they reached sexual maturity
- infanticide
History of birth control in Canada
- using, selling, disseminating used to be a crime
- by the 60’s after the baby boomers, concerns about overpopulation made contraception more acceptable
- birth control removed from criminal code in 69
Modern methods of birth control
- contraceptives made a breakthrough in 16th century w Gabriello Fallopio’s invention of the condom
- into 20th century contraceptives were favoured again due to activists like Margaret Sanger
- limited knowledge of contraceptives beyond external and oral contraceptives in Canada
what are contraceptives
- methods/ tools intended to reduce the likelihood of pregnancy
- may not protect against STIs
- ovulation, fertilization, implantation (or a combination) interference
Abstinence
- only 100% effective form of birth control
- ppl have different definitions
- still has the risk of STIs (depending on what ppls definitions are)
- can also increase chances of risky behaviour in the future bc they haven’t received proper education
- AOE can actually contribute to higher teen pregnancy rates
How hormonal contraceptives work
- reversible methods of birth control that protect against pregnancy but not STIs
- inhibit ovulation, alter endometrium, and/or alter cervical mucus
- requires a prescription
- physician administered are more long-term, self-administered requires less doctor attention but are more short-term
- must be taken regularly regardless of how sexually active
- Pros: reduce symptoms of period, regulate period, reduce acne
- Cons: spotting, decreased libido, nausea, headache, weight gain, risk of blood clots (estrogen)
Types of hormonal contraceptives
- Combination (estrogen and progesterone): oral pill, transdermal patch, NuvaRing
- Progesterone only: mini-pill, injectable (depo-provera), levonogestrel-releasing intra-uterine system (LNG-IUS)
Types of non-hormonal contraceptives
- copper IUD (CuIUD)
- cervical barrier methods/spermicides: contraceptive sponge, cervical cap, diaphragm, spermicidal jelly and condoms
- internal and external condom
Surgical methods of contraceptive
- female sterilization: tubal ligation
- male sterilization: vasectomy
Oral contraceptive pill (the pill)
- most common –> prevents ovulation
- 21 days w pill, and 7 days w out w a withdrawal bleed
- failure rate: perfect use = 0.3%, typical use = 9%
- pros: easy to use
- cons: remembering to take it daily
Transdermal contraceptive patch
- patch applied every week for 3 weeks and then removed for a week w withdrawal bleed; new spot each time (prevents ovulation)
- failure rate: perfect use = 0.3%, typical use = 9%
- pros: need to remember only once per week
- cons: can cause skin irritation, might be visible
NuvaRing
- ring inserted near cervix for 3 weeks and then removed for a week w withdrawal bleed (prevents ovulation)
- failure rate: perfect use = 0.3%, typical use = 9%
- pros: need to remember only once per month
- cons: possible increased risk of vaginitis, interference w intercourse sometimes reported
Mini-pill
- 21 days of pill, and 7 days of placebo pill (no breaks for menstruation) –> thicken cervical mucus, thin endometrium
- failure rate: perfect use = 0.3%, typical use = 9%
- pros: easy to take
- cons: must be taken at the exact same time (within 3 hours) each day
Depo-Provera
- intramuscular injection every 3 months –> thicken cervical mucus
- failure rate: perfect use = 0.2%, typical use = 6%
- not first-line of defence until after about 3 months, so want another hormone or barrier at the beginning
- delayed return to fertility after cessation
- pros: need to remember once every 3 months, reduced risk of endometrial cancer, endometriosis, chronic pelvic pain, and PMS
- cons: weight gain and mood changes, decreased bone mineral density, need to see health care worker
LNG-IUS
- T-shaped device w slow-release hormone (progesterone) inserted into uterus by physician –> thins endometrium
- failure rate: perfect use and typical use = 0.2%
- pros: not having to think ab contraception for 5 years, lower dose of hormones than OC (localized), significantly reduced menstrual flow
- cons: benign ovarian cysts, rare risk of uterine perforation or infection during insertion, exposure to STIs is associated w pelvic inflammatory disease, possibility of expulsion
Cu-IUD
- t-shaped device inserted into uterus by physician
- makes uterine environment inhospitable to sperm and inhibits implantation
- failure rate: perfect use = 0.8% (usually during first 3 months)
- pros: lasts for 5 years, reduced risk of endometrial cancer, no hormonal side effects
- cons: possible irregular bleeding, increase in blood loss during menstruation, exposure to STIs is associated w pelvic inflammatory disease, possibility of expulsion or uterine perforation
Cervical barrier/spermicide MOA
- create barriers at the cervix so no sperm can get through
- spermicide used with these methods provides extra protection by killing some sperm
- do not provide STI protection
- pros: no hormonal side effects
- cons: increased risk of TSS, unsuitable for those w recurrent vaginal infections or UTIs, insertion difficult for some users
Contraceptive sponge
- moisten w water and inserted; lasts 12-24 h and removed 6-8 hours after ejaculation
- failure rate: nulliparous: perfect = 9%, typical = 12%; parous: perfect: 20%, typical = 24%
- pros: no prescription needed, already contains spermicide
- cons: high failure rate w typical use
Cervical cap
- held in place against cervix by suction
- failure rate: nulliparous = 13%, parous = 29%
- pros: made of silicon, can be left in for 72 h
- cons: can be dislodged during intercourse, may cause vaginal odour
Diaphragm
- inserted up to 6 hours before intercourse and removed within 24 hours; replaced every 2 years
- failure rate: perfect use = 6%, typical use = 12%
- pros: reduced incidence of cervical dysplasia
- cons: not widely available, available w prescription only, body weight changes requires new sizing
Spermicides
- paired w barrier methods to be more effective, and is only effective for one act of intercourse
- vaginal contraceptive film: inserted into vagina 15-60 mins before intercourse
- bioadhesive jelly: inserted w applicator and effective immediately and or 24 hours
- foam: inserted w applicator and effective immediately and for 1 hour
- suppositories: inserted 10-15 mins prior to intercourse and effective for an hour
- jellies/creams: primarily for use w diaphragm or cervical cap and effective for 8-8 hours
- failure rate: perfect use = 18%, typical use = 28%
- pros: can also function as lubricant, no prescription, can lower risk of PID
- cons: can be irritating and increase risk of STIs, can be messy, can take time to be effective and aren’t effective for long
Internal condom
- creates physical barrier to trap sperm
- inserted into vagina up to 8 hours before intercourse
- failure rate: perfect use = 5%, typical use = 21%
- pros: protects against STIs, made form polyurethane, no prescription, can be used for anal, extra protection bc it rests against vulva
- cons: appears bulky, crinkly or suction noises, more expensive and less widely available
External condom
- makes physical barrier to trap sperm
- rolled onto penis and used w a water-based lubricant
- failure rate: latex: perfect use = 2%, typical use = 18% –> polyurethane have higher frequency of breakage and slippage
- pros: no prescription, protects against STI, widely available and sometimes free, putting it on can be incorporated into sex play
- cons: effectiveness decreases if not stored correctly, can reduce sensitivity
Dental Dams- used for STI protection during non-penetrative activities (normal condoms can be turned into dental dams bc they aren’t that widely available and are pricier)
Vasectomy
- vas deferens are cut and sealed to prevent sperm from entering ejaculate
- failure rate: 0.05% (sperm is in ejaculate for 10-30 ejaculations)
- pros: relatively simple w few complications, reversible surgery is available
- cons: does not protect against STIs, potential short-term and long-term complications associated w surgery
Tubal ligation
- fallopian tubes are severed and sealed to prevent egg and sperm from ever meeting
- failure rate: depends on type of surgery, but 99% effective (0.5%)
- pros: not having to think about contraception again
- cons: does not protect against STI, possible increased risk of ectopic pregnancy
Natural methods
- methods w no human made barriers or methods
- pros: can be used in conjunction w other barrier methods, are reversible, don’t introduce chemicals into body, and are supported by religious groups
- cons: don’t protect against STIs and intercourse must be avoided during ovulation periods
- include: fertility awareness methods (sympto-thermal approach), calendar-based methods (rhythm method, standard-days method), lactational amenorrhea, withdrawal method
Fertility awareness methods of contraception
- used to conceive rather than to avoid conception
- disadvantage is women are limited to when they can have intercourse, lots of vigilance
- *Sympatothermal approach:**
- Chart basal body temperature (BBT), cervical position, and cervical mucus to gain insight into when one is fertile
- slight rise in temp following ovulation (most fertile 3 days after this)
- Cervix is furthest away from vaginal opening and mucus is clear and more elastic as ovulation approaches
Calendar based methods of contraception
- not recommended as primary methods of contraception
- *Rhythm method:**
- Fertile time is calculated based on the length of the previous 12 cycles
- if shortest was 26 days (-20) and longest was 31 days (-10) then fertile time would last from day 6 to 21, meaning unprotected sex can occur on day 1-5 and 22-beginning of next cycle
- *Standard-days method:**
- more accurate variation that works for those with menstrual cycles between 26 and 32 days in length
- assumes days 8 through 19 are unsafe if pregnancy prevention is the goal
Lactational amenorrhea
- causes hormonal suppression of ovulation
- 98% effective as a temporary postpartum method of birth control as long as menstruation has not returned, the baby is being nursed exclusively with breast milk, and the baby is less than six months
The withdrawal method
- Requires the withdrawal of the penis from the vagina before ejaculation to prevent sperm from entering the cervix
- Perfect use estimates 96% effective and typical use 81%
- pros: neither chemicals nor barriers needed
- cons: intercourse is interrupted partway through, pregnancy can still occur from pre-ejaculate
Birth control use around the world
- most common are female sterilization and IUD, followed by OC pills and condoms
- some countries where women have a lower status, they are prohibited form using contraceptives
Birth control use in Canada
- most frequent method is condoms, then OCs then withdrawal (IUDs not widely used)
Information-motivation-behavioural skills (IMB) model
- Contraceptive information needs to be easy to understand, and accessible in a timely manner and an individual needs motivation to avoid engaging in risky sexual behaviours
- Motivation can come from personal attitudes and/or social norms that discourage sexual risk-taking, as well as an individual’s perceived vulnerability to unwanted pregnancies or STI’s
- A person’s behavioural skills need to be developed so they are self-efficacious and confident when implementing a birth control
- One way to achieve these goals is through sex-ed, developing positive attitudes toward social norms of contraceptive use, and helping individuals build skills to make good choices –> the more open and comfortable, the more likely they will be safe and comply w birth control
Emergency Contraceptive
- any contraceptive used after intercourse and before the time that the egg can implant into the uterine lining –> does not have an effect on established pregnancy
- *The emergency contraceptive pill:**
- morning after pill taken within 72 hours post-coitus –> Plan B = levongestrol (less nausea) and Yuzpe = levongestrel + estrogen + estrodiol
- *Post-coital IUD insertion:**
- effectiveness approaches 100%
- must be inserted within 7 days of the intercourse, and requires a doctor’s appointment and prescription
Therapeutic vs elective abortion
- Therapeutic abortions are performed due to maternal health problems and fetal anomalies that threaten the health or survival of either the birthing parent or the fetus
- Elective abortion reasons include not feeling ready to care for a child, financial concerns, concerns that a child will interfere with the current responsibilities to others, avoidance of single parenthood, relationship issues, or too young or immature to raise a child
History of abortion in Canada
- made illegal in 1869
- Dr. henry Morgentaler defied laws and performed abortions regardless of a woman’s health
- abortion became legal in 1988
Medical Abortions:
- usually performed up to 7 weeks following the last menstrual period but can be done up until the 10th week of gestation
- One option: first injection of methotrexate to stop growth of fetus, and 5 days later at home, woman takes misoprostol (suppository or orally) to cause uterus to contract and expel contents
- another option: RU-486 (mifepristone) blocks progesterone which prepares the lining of the uterus for a fertilized egg and without progesterone the pregnancy cannot proceed –> lining of the uterus softens and breaks down and bleeding begins
- -> prostaglandin misoprostol causes the uterus to contract and completes the abortion process
- main advantage is is they are less invasive and avoid risks involving surgical instruments
Types of Surgical Abortions
- manual vacuum aspiration
- vacuum suction curretage
- dilation and evacuation
- second- and third- trimester abortions
Manual vacuum aspiration
- only surgical option available during the first 7 weeks
- Flexible tube is inserted into the cervix and a syringe attached to the tube remove the contents of the uterus by creating suction
- 10 mins and generally safe and effective
Vacuum suction curettage
- usually performed from the 6th- 14th week of gestation
- in preparation, the cervix is gradually dilated, and then a tube is inserted through the opening of the uterus
- contents of uterus are suctioned out and curette used to ensure all tissue has been removed
Dilation and evacuation
- used for abortions in the 13th-16th weeks of gestation
- Similar to vacuum suction curettage but it’s more complicated because of the increase size the fetus and must be done in the hospital under general and aesthetics
- Beyond the 16th week the fetus is removed with forceps
Second- and third-trimester abortions
- Abortions that occur after the 20th week of gestation involve an injection of a substance stop the fetal heart and removal of the fetus with the assistance of forceps
- labour is sometimes induced, and c-section is performed as a last resort
- Late pregnancy abortions are rare and often most performed because of diagnosed fetal anomalies
History of syphilis and herpes
- thought columbus brought syphilis to the new world from europe
- others thought it was what they already referred to as leprosy
- first treated w arsenic and then penicillin
History of HIV/AIDs
- AIDs epidemic began in 81 and the probably source was a cross from primates to humans
- widespread in MSM and injection drug users –> healthcare personnel were apprehensive to help bc of the stigma of these groups
- leading cause of death of males under 50 in north america in the 80s and 90s
- everything changed w the intro of ART –> can prevent transmission by reducing viral load, turn AIDs into a manageable chronic condition, prevent infection in at risk uninfected indv
Examples of Bacterial STIs
- chlamydia
- gonorrhea
- syphillis
- can be cured w antibiotics
Chlamydia
- PREVALENCE: highest prevalence of any STI (most common bacterial infection), and highest in adults aged 20-24
- ROT: penile-anal, penile-vaginal most common, but oral also, sharing sex toys, and to child during childbirth
- SYMPTOMS: usually asymptomatic, but can have mild symptoms like discharge, urinary burning/itching, vaginal bleeding
- CONSEQUENCES: may cause PID which can lead to infertility and increased likelihood of ectopic pregnancy and chronic pelvic pain (CPP), can cause urethritis which can cause epididymitis
- DIAGNOSIS: swab from cervix, urethra, anus, pharynx, or urine sample
- TREATMENT: one-time dose of oral antibiotics
- PREVENTION: internal external condoms, and negative screening
Gonorrhea
- PREVALENCE: highest among MSM and those who have sex while travelling
- ROT: penile-vaginal, penile-anal most common, but also oral, sharing toys, and to infant during childbirth
- SYMPTOMS: more frequently symptomatic than chlamydia, yellowish white discharge/pus, oral is asymptomatic
- CONSEQUENCES: can cause PID in women, rare cases can enter blood and affect joints, skin, and tissues around liver, heart and brain membranes
- DIAGNOSIS: swab from cervix, vagina, urethra, anus, or pharynx, or blood or urine sample
- TREATMENT: oral or injectable antibiotics, injection if in pharynx or PID or epididymitis occurs, also treat chlamydia bc comorbid (antibiotic resistance!!!!)
- PREVENTION: internal and external condoms
Syphilis
- PREVALENCE: not common in general public but higher in MSM and those who have sex while travelling
- ROT: penile-vaginal and penile-anal intercourse and oral routes most common, but also during childbirth and pregnancy, injection drug use, and sharing sex toys
- SYMPTOMS: primary- swelling of lymph nodes (flu symptoms) and painless ulcers; secondary- after 3 weeks, rashes, lesions, erosions in mouth and genitals, fever, malaise, jaundice, muscle joint aches, patchy loss of hair; ocular syphilis that leads to blindness can also occur
- CONSEQUENCES: of untreated can lead to tertiary stage where it affects blood vessels, heart, and eyes, and sensory or brain damage may occur, growths on bones and organs that lead to death, and may increase HIV acquisition and transmission
- DIAGNOSIS: blood test for antibodies, and test repeated after 3 weeks to confirm
- TREATMENT: injectable benzathine penicillin (course of antibiotics)
- PREVENTION: external and internal condom use
Examples of Viral STIs
- Herpes
- HPV
- HIV
- Viral hepatitis
- most cant be cured, but can be prevented (vaccines, safe practices), and managed
Herpes (HSV)
- HSV-1: orolabial, HSV-2: anogenital
- PREVALENCE: not reportable so limited info; affects women more than men
- ROT: genital-genital, oral-genital, oral-anal, oral-oral contact (skin to skin contact), infants during childbirth, can still potentially be transmitted even if no visible sores
- SYMPTOMS: orolabial: lesions around lips; anogenital: lesions, regional swollen lymph nodes, blistery lesions when recurs, outbreak lasts a few days but virus remains latent for life
- CONSEQUENCES: blisters can cause scarring, may cause UTIs, heighten HIV transmission and acquisition, distress, infants infected can experience neurological and other impairments and death
- DIAGNOSIS: swabbing lesions, viral identification test (not 100%)
- TREATMENT: oral antivirals can limit strength of outbreaks, for those w frequent outbreaks, oral antivirals taken at prodromal stage can prevent/shorten outbreak, daily antivirals for those w severe frequent infections, local antivirals not as efficacious, keeping lesions dry and clean can lessen local symptoms
- PREVENTION: condoms help but not entirely, blood test for detection for symptomatic and high risk ppl (not routine bc false positives = bad)