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PSIO469 - Repro > Emergency Contraception and Abortion > Flashcards

Emergency Contraception and Abortion Flashcards

1
Q

What is emergency contraception?

A

Broad term to describe drug of device used to prevent pregnancy after unprotected sexual intercourse

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2
Q

Two progestogen only plan B types

A
  • Plan B: two 0.75 mg doses 12 hours apart
  • Plan B One-Step: one 1.5 mg dose
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3
Q

Effectiveness of emergency contraception pill

A
  • 61-95%
  • If taken within 24 hours it is 95% effective
  • If taken between 48 and 72 hours it is 61% effective
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4
Q

Which hormones do they assay for determining the timing of ovulation?

A
  • LH
  • Estradiol (E2)
  • Progesterone (P4)
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5
Q

What is a transvaginal ultrasound examining to determine cycle timing?

A
  • Follicle dimensions
  • Endometrial appearance
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6
Q

Average follicle ruptures at what size?

A

20 mm in diameter

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7
Q

What is the probability of clinical pregnancy 5 days before day of ovulation?

A

4% (0.04)

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8
Q

What is the probability of clinical pregnancy 3 days before day of ovulation?

A

8% (0.08)

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8
Q

What is the probability of clinical pregnancy 4 days before day of ovulation?

A

13% (0.13)

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8
Q

What is the probability of clinical pregnancy 2 days before day of ovulation?

A

29% (0.29)

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9
Q

What is the probability of clinical pregnancy 1 day before day of ovulation?

A

27% (0.27)

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9
Q

How does LNG-EC (morning after pill) play a role in pre-fertilization events?

A
  • Prevent follicle maturation and/or ovulation by suppressing LH and FSH and/or LH surge.
  • Single dose effects cervical mucous and sperm motility for 24 hours.
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9
Q

What is the probability of clinical pregnancy on the day of ovulation?

A

8% (0.8)

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9
Q

How does “morning after” pill impact post-fertilization events?

A
  • Short answer: it doesn’t
  • Does not increase ectopic pregnancy, embryo movement, and will not harm existing pregnancy.
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9
Q

How many days after unprotected intercourse should an IUD be placed to act as emergency contraception?

A

Within 5 days

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9
Q

Are you less likely to get pregnant if you take emergency contraceptive before or after ovulation?

A

Before

10
Q

Mechanism of action of IUD as emergency contraception during follicular phase

A

May immobilize sperm or prevent their migration to the oviduct to prevent fertilization

11
Q

Mechanism of action of IUD as emergency contraception during luteal phase

A
  • Creates inflammatory reaction in endometrium
  • Copper is embryotoxic
12
Q

Is the hormonal or non-hormonal IUD more effective as emergency contraceptive?

A

Equally

13
Q

Yuzpe regimen

A

Morning after pill with combined progestogen and estrogen

PSIO469 - Repro (18 decks)

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