Lecture 11 (OB)-Exam 5 Flashcards
Infertility
* What is the def?*
* Specific treatment depends on what?
- Inability to conceive after 12 months with regular, unprotected intercourse
- Specific treatment depends on underlying etiology
Infertility
* What are the general lifestyle factors? (3)
- Abstain from tobacco
- Limit alcohol intake
- Maintain BMI > 17 and < 30 kg/m2
Infertility
* How do you men and women start the work up?
- Men – start with semen analysis
- Women – determine if ovulating
Infertility
* What is the first test for infertility in women? What are the levels?
Day 21 progesterone level
* ≥ 5ng/mL = ovulating, evaluate for other causes
* < 5ng/mL = not ovulating, evaluate underlying cause
* Consider ovulation induction
Ovulation induction
* What is the MOA of Clomiphene (SERMs)
Inhibits estrogen receptors in the hypothalamus
* Inhibits the estrogen negative feedback
* Hypothalamus increases GnRH release in response to decreased estrogen negative FB
* Increased LH/FSH
* Ovary stimulation
* Ovulation
Ovulation induction
* When do you take Clomiphene
50 to 100 mg PO daily on days 5 to 10 of ovarian cycle
Ovulation induction:Letrozole
* What is the MOA?
* Not what?
* Stimulates what?
* Replaces what?
* Highest what?
Letrozole – aromatase inhibitor
* Not FDA approved indication
* Stimulates ovulation
* Replaces historic clomiphene
* Highest cumulative pregnancy and live birth rate (80% and 30 to 40%, respectively)
Ovulation induction
* When do you take letrozole?
Regimen: 2.5 to 7.5 mg PO daily on days 3 to 7 of the ovarian cycle
Immunizations
* When should they be given ideally?
Ideally should be administered prior to pregnancy
TEST
Immunizations
* What is safe during pregnancy?(6)
- Pneumococcal
- Meningococcal
- Hepatitis A, B
- Inactivated polio
- Inactivated influenza–should be given, ok any trimester
- Tdap
Tdap:
* Should be given when?
should be given at 27-36 weeks REGARDLESS of prior immunization hx (there is some passive antibody transfer to infant). All persons with close contact to infant should also be immunized
Immunizations
* What is not safe?
* What is uncertain/not recommended?
Not safe:
* Measles/mumps/rubella
* Polio
* Varicella
Uncertain/Not recommended
* HPV Vaccine. No adverse outcomes have been described but not recommended. If found to be pregnant during series, remaining doses given after pregnancy
RH incompatibility
* What is it?
Discordant pairing of maternal and fetal Rh factor
* Rh negative mothers – Rh positive infants
RH incompatibility
* What is the process?
* What is the goal?
- Exposure to Rh positive blood cells from fetus results in development of maternal anti-D IgG antibodies against Rh positive antigens on the fetus RBCs
- Antibodies can cross placenta of subsequent pregnancies and destroy fetal RBCs
- Hemolytic disease of the newborn
- Goal is to prevent formation of anti-D IgG antibodies
RH incompatibility
* All women need to be screen ?
* Rh neg women->
- All women should be screened for Rh status at first prenatal visit
- Rh neg women -> check anti-D antibodies
RH incompatibility
* If anti-Rh D antibody positive->
* If anti-Rh D antibody negative->
If anti-Rh D antibody positive -> NOT a candidate for Rh0 (D) immune globulin
* May require no additional testing if dad is known to be Rh negative
If anti-Rh D antibody negative -> further testing and Rh0 (D) immune globulin indicated
Rh0 (D) immune globulin - prophylaxis
* What is the standard regimens? (28 week gestation and postpartum)
Rh0 (D) immune globulin - prophylaxis
* What are the sensitizing event regimens?
Rh0 (D) immune globulin
* What is the MOA?
* What are the SEs?
MOA: thought to destroy Rh positive blood cells before maternal antibodies can be formed
Adverse reactions:
* Headache, drowsiness, dizziness, blood pressure changes, injection site reactions, allergic reaction
Rh0 (D) immune globulin
* What is the dosing?
Most indications
* 300 mcg IM x 1 dose
* 300 mcg provides sufficient antibody if volume of exposed Rh pos RBC exposure is ≤ 30 mL
Spontaneous / threatened / induced abortion < 13 weeks
* 50 mcg IM x 1 dose
* TEST
What are the Drugs contraindicated in pregnancy?(7)
- Statins
- Spironolactone
- Warfarin – fetal syndrome
- Anticonvulsants – topiramate
- Guaifenesin – neural tube defects
- Isotretinoin, tretinoin
- Antibiotics
Drugs in lactation
* Need for what?
* Potential SE on what?
* What are the characteristics for amount excreted in breast milk?
Need for drug by mom
Potential side effects on milk production
Amount excreted in the breast milk
* Unionized, small molecule, high lipid solubility, low Vd, low protein binding
Drugs in lactation
* Drug what?
* Potential what?
* Age of who?
* What status?
* What agents?
- Drug half-life
- Potential adverse effects
- Age of infant
- Maternal HIV status
- Chemotherapy agents
lactation
* What are the contraindicated medications?(6)
- Acebutolol, atenolol– hypotension, bradycardia
- Amiodarone - hypothyroidism
- Antidepressants - some
- Aspirin – metabolic acidosis
- Benzodiazepines
- Cytotoxic agents – methotrexate
lactation
* What are the rest of the contraindicated medications?
- Ergotamine – N/V/seizures
- Estradiol
- Lamotrigine
- Lithium
- Nitrofurantoin – hemolysis if G6PD deficient
- Phenobarbital
- Sulfasalazine – blood diarrhea
Ectopic pregnancy treatment
* What are the three primary options? (general)
- Surgical – salpingostomy or salpingectomy
- Methotrexate
- Expectant management
Ectopic pregnancy treatment: Methotrexarte
* For who?
* What bhCG levels?
* What is not on US?
* Reliable/close access to what?
- Hemodynamically stable
- Beta-hCG ≤ 5000 milli-IU/mL
- No fetal cardiac activity on transvaginal ultrasound (TVUS)
- Reliable / close access to emergency services
Ectopic pregnancy treatment: Expectant management
* Common or uncommon?
* What is the bhCG levels?
* No identifiable what?
* Reliable / close access to what?
- Uncommon
- Beta hCG < 200 and falling
- No identifiable pregnancy on TVUS
- Reliable / close access to emergency services
methotrexate
* What is the MOA?
* Pharmacokinetics?
MOA:
* Folic acid antagonist
* Inhibits DNA synthesis and cell reproduction of rapidly proliferating cells
* Trophoblasts and fetal cells
Pharmacokinetics:
* Rapid clearance by the kidney
* 90% cleared in 24 hours
methotrexate
* What are the SE?
* When do you need to follow up?
Adverse reactions:
* MC stomatitis / conjunctivitis
* Nausea / vomiting
Follow up:
* hCG level on days 4 and 7
* If ≥ 15% decrease no additional doses
* Monitor hcg weekly until undetectable
* If < 15% decrease, additional doses indicated
Caring for the Pregnant Diabetic Patient
* tight glycemic control to what?
* Poor control in early pregnancy =
* Poor control in late pregnancy =
- Tight glycemic control to normal HbA1c [< 6 (ideal) to < 7] – while preventing hypoglycemia
- Poor control in early pregnancy = increased risk of spontaneous abortion and congenital malformations
- Poor control in late pregnancy = increased risk of pre-term labor, preeclampsia, shoulder dystocia, and stillbirth
Frequent monitoring of blood sugar recommended
* TEST
Gestational diabetes screening - 24 to 28 weeks gestation
KNOW NUMBERS
*
Gestational diabetes
* What is the txt?
* What is the pharmacotherapy?
*
Gestational diabetes
* What are the goals? (3)
- Fasting and preprandial blood glucose concentration: <95 mg/dL (5.3 mmol/L)
- One-hour postprandial blood glucose concentration: <140 mg/dL (7.8 mmol/L)
- Two-hour postprandial glucose concentration: <120 mg/dL (6.7 mmol/L)
Gestational diabetes
* Women with gestational diabetes are at increased risk of what?
* 2-hour oral glucose tolerance test recommended when?
* Screen patients when?
- Women with gestational diabetes are at increased risk of developing diabetes
- 2-hour oral glucose tolerance test recommended at 6-weeks postpartum
- Screen patients at least every 3 years for diabetes
Gestational diabetes
* What are the lifestyle interventions?
Lifestyle interventions (eg, achieving a healthy weight, appropriate level of physical activity/exercise) are clearly beneficial for reducing the incidence of diabetes, and related comorbidities such as cardiovascular disease.
* TEST
Hypertension - pregnancy
* What is the definition?
≥ 140 or ≥ 90 mmHg on two separate occasions at least 4 hours apart or ≥ 160/110 mmHg on one occasion
*
Hypertension - pregnancy
* What is pre-eclampsia?
* What is eclampsia?
- Pre-eclampsia – new onset hypertension after 20 weeks gestation associated with proteinuria ± edema, elevated liver enzymes, thrombocytopenia, cerebral edema/vision changes
- Eclampsia – pre-eclampsia plus seizures
Hypertension - pregnancy
* What is chronic hypertension?
* What is gestational hypertension?
- Chronic hypertension – preexisting hypertension prior to pregnancy
- Gestational hypertension – hypertension after 20 weeks gestation NOT associated with proteinuria or other systemic symptoms