Optimizing the Temperature for Embryo Culture in In Vitro Fertilization

Infertility Clinical Trial

Official title:

Optimizing the Temperature for Embryo Culture in In Vitro Fertilization: A Randomized Controlled Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01506089
• Other study ID #: RMA-2011-02
• Status: Completed
• Phase: N/A
• First received: January 3, 2012
• Last updated: March 25, 2015
• Start date: January 2012
• Est. completion date: July 2014

Study information

• Verified date: March 2015
• Source: Reproductive Medicine Associates of New Jersey
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Interventional

Clinical Trial Summary

Many human and animal studies over the past 40 years have revealed that ovaries and Fallopian tubes have a lower temperature than core body temperature, especially around the time of ovulation and early embryo development. Whether average core body temperature, 37 degrees Celsius, is ideal temperature for culture has not been prospectively evaluated. The purpose of this study is to determine whether lowering the incubator temperature by 1 degree Celsius will result in meaningful improvements in embryo development and pregnancy rates.

Patients participating in this study will undergo routine in vitro fertilization (IVF) stimulation. Following egg retrieval, patients with at least 8 mature eggs will have those eggs divided randomly into two groups. Both groups will then under ICSI (intra-cytoplasmic sperm injection) to fertilize the eggs. The groups will randomly be assigned to control or study condition. The control condition group will be cultured at 37 degrees Celsius, the current standard of care. The study group will be cultured at 36 degrees Celsius. All other culture conditions will be kept identical and embryos will be assessed on day 3 and day 5 of development.

On day 5, all well-developed blastocysts will undergo biopsy for Comprehensive Chromosomal Screening (CCS), which will evaluate the chromosomal normalcy of the embryo . Patients will undergo transfer on the morning of day 6 and the highest quality, chromosomally normal embryo from each group (the 36 degree cultured embryos and the 37 degree cultured embryos) will be transferred. If only 1 embryo is available for transfer, the patient will have a single embryo transfer.

All embryos available for cryopreservation will undergo biopsy for CCS before being frozen. Some arrested embryos from each temperature group will also undergo genetic analysis to evaluate chromosomal normalcy or mosaicism.

The female patient will undergo a blood draw at 9 weeks gestation and buccal swabs will be obtained from the infant(s) after birth.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 55
• Est. completion date: July 2014
• Est. primary completion date: January 2014
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years to 41 Years

Eligibility

Inclusion Criteria:

• No more than 1 prior failed cycle at RMA NJ facility; up to 2 prior failed cycles at another facility pending investigator review

• Female partner between 18 and 41 at onset of IVF cycle

• Normal day 3 FSH (< or = 12) in RMA NJ laboratory

• Basal antral follicle count of at least 10

• Male partner with greater than 100,000 total motile spermatozoa per ejaculate (donor sperm is ok)

• BMI < or = 32 kg/m2

Exclusion Criteria:

• Diagnosis of chronic anovulation (cycles occuring typically less often than every 90 days)

• Use of testicular aspiration or biopsy procedures to obtain sperm

• Unevaluated ovarian mass or diagnosis of surgically-confirmed stage IV endometriosis

• Presence of hydrosalpinges that communicate with the uterine cavity

• History of endometrial insufficiency

• Any contraindication to undergoing IVF or gonadotropin stimulation

• Prior poor fertilization rate- less than 50% of mature eggs

• Prior poor blastulation rate- less than 10% of 2PNs (day 1 embryos)

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label

Related Conditions & MeSH terms

• Infertility

Intervention

Other:
• 36 degrees Celsius
Embryos in this group will be cultured in incubators set to 36 degrees Celsius.

Locations

Country	Name	City	State
United States	Reproductive Medicine Associates of Pennsylvannia	Allentown	Pennsylvania
United States	Reproductive Medicine Associates of New Jersey	Morristown	New Jersey

Sponsors (1)

Lead Sponsor	Collaborator
Reproductive Medicine Associates of New Jersey

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Useable Blastocyst Formation Rate	Proportion of mature eggs developing into expanded blastocysts (Gardner grade 3-6) of sufficient quality to transfer or cryopreserve will be documented for each group (36 degree and 37 degree group).	approximately 1 week	No
Secondary	Fertilization rate	The proportion of mature eggs that underwent ICSI and are normally fertlized (documented as forming 2 pro-nuclei (2PNs)) on the day after egg retrieval will be documented for each group (36 degree and 37 degree groups)	approximately 2 days	No
Secondary	Cleavage Rate	Proportion of properly fertlized embryo (2PNs on day 1) that undergo further celluar division will be documented for each group (36 degree and 37 degree group).	approximately 1 week	No
Secondary	Blastocyst Formation Rate	Proportion of mature oocytes that go on to develop into blastocysts in each group (36 degree group and 37 degree group) will be documented.	approximately 1 week	No
Secondary	Implantation Rate	Proportion of transferred embryos resulting in a clinically documented pregnancy will be documented for each group (36 degree and 37 degree group).	approximately 2 weeks	No
Secondary	Aneuploidy Rate	Rate of chromosomal abnormalities among the embryos in each group (36 degree and 37 degree groups) as determined by polymerase chain reaction (PCR) based comprehensive chromosome screening (CCS).	approximately 1 month	No
Secondary	Mosaicism Rate	Proportion of embryos that arrest at the cleavage stage which show evidence of more than one chromosomal lineages (mosaicism) when analyzed my microarray documented in each group (36 degree and 37 degree group).	approximately 1 month	No

External Links

•   Reproductive Medicine Associates of New Jersey