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Frozen-Thawed Embryo Transfer

 

What is your preferred timing for embryo freezing
  • oocyte of 2pn
  • Day 2
  • Day 3
  • Blastocyst
  • Varies and indvidualized

 

Are you using a time period between the fresh and frozen cycle?
  • Yes
  • No
  • Both

 

In patients with regular ovulatory cycles, what is your preferred method for patient preparation for FET?
  • Natural cycle (NC)
  • Hormone replacement
  • Ovulation induction (i.e., clomiphene, gonadotropins)
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, what is your preferred monitoring approach?
  • Urinary LH kits
  • Ultrasound only
  • Blood testing for E2 and progesterone
  • Blood testing for E2 progesterone and LH
  • A combination of ultrasound and blood testing
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, how do you determine the ovulation day?
  • A-Continue monitoring until demonstration that ovulation has occurred
  • B-Triggering ovulation with hCG
  • C-Triggering ovulation with GnRH-Agonist
  • A+B
  • B+C
  • A+C
  • All
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, is there a minimum endometrial thickness at the time of ovulation necessary for embryo thawing and transfer?
  • No
  • >5mm
  • >6mm
  • >7mm
  • >8mm
  • >9mm
  • >10 mm
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, do you add luteal phase support?
  • No
  • Yes, progesterone only
  • Yes, progesterone and estrogen
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, if you add luteal phase support?
  • No support
  • IM injection
  • Both in the same cycle
  • Both IM and vaginal progesterone in different cycles
  • Vaginal
  • Other
  • None

 

In patients undergoing Natural Cycle - FET, if you add luteal support, when do you stop it?
  • At the time of a positive pregnancy test
  • At the time fetal heart beat is detected
  • At 8 gestational weeks
  • At 10 gestational weeks
  • At 12 gestational weeks
  • Other
  • None

 

In ovulatory patients undergoing hormone replacement therapy - FET, do you prefer to use GnRH agonist pituitary suppression for the cycle?
  • Yes
  • No
  • No such protocol

 

In ovulatory patients undergoing hormone replacement therapy - FET, do you prefer to use GnRH antagonist pituitary suppression for the cycle?
  • Yes
  • No
  • No such protocol

 

Which route of administration do you prefer for estrogen?
  • Oral
  • Transdermal
  • Vaginal
  • Intramuscular
  • No such protocol

 

Which route of administration do you prefer for progesterone?
  • Oral
  • Transdermal
  • Vaginal
  • Intramuscular
  • A combination of vaginal and IM in the same cycle
  • A combination of oral and IM in the same cycle
  • No such protocol

 

In patients undergoing hormone replacement therapy - FET, what is your preferred monitoring approach?
  • Ultrasound only
  • Blood testing for E2 and progesterone
  • A combination of ultrasound and blood testing
  • Other
  • No such protocol

 

In patients undergoing hormone replacement therapy - FET, is there a minimum endometrial thickness necessary at the time of progesterone administration for embryo thawing and transfer?
  • No
  • >5mm
  • >6mm
  • >7mm
  • >8mm
  • >9mm
  • >10 mm
  • No such protocol

 

In patients undergoing hormone replacement therapy - FET, when do you stop hormone replacement?
  • At the time of a positive pregnancy test
  • At the time fetal heart beat is detected
  • At 8 gestational weeks
  • At 10 gestational weeks
  • At 12 gestational weeks
  • >12 gestational weeks

 

In patients undergoing ovulation induction - FET, do you prefer to use GnRH agonist or GnRH antagonists?
  • No
  • Agonist
  • Antagonit
  • Both
  • No such protocol

 

In patients undergoing ovulation induction - FET, do you prefer to use clomiphene citrate or gonadotropin?
  • Clomiphene citrate
  • Gonadotropins
  • No such protocol

 

Do you thaw embryos on the day of ET or 1 day earlier and allow overnight culture?
  • Same day (All embryos)
  • One day earlier with overnight culture, If not at blastocyst stage
  • Same day only if the embryos are on blastocyst stage