Clinical trial NCT01348594: The Impact of Vitamin D Status on in Vitro Fertilization (IVF) Outcomes
Official title: The Impact of Vitamin D on Implantation and Clinical Pregnancy Rates Following in Vitro Fertilization
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Vitamin D Status
Keywords: Vitamin D
In vitro Fertilization
Lead sponsor: University of Toronto
Sponsor class: OTHER
First posted: 2011-05-05
Enrollment: 182
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 40
Standard ages: ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients undergoing IVF at Mount Sinai Hospital

Brief summary: Infertility is a common and psychologically devastating problem for 20% of Canadian couples. Approximately, 20% of infertile couples are diagnosed with unexplained infertility and left without an explanation for their inability to have a baby. Pathological uterine receptivity and embryo implantation are hypothesized mechanisms underlying sub-fertility in these couples. Embryo implantation requires a complicated sequence of events involving the differentiation of endometrial cells to attain uterine receptivity and the synchronized interaction between maternal and embryonic tissues. Vitamin D has been hypothesized to play a role in this poorly understood process. Vitamin D is a known regulator of signal transduction pathways involved in embryo implantation and its receptors are involved in calcium-regulation in various reproductive tissues including, the ovary, uterus, and placenta. In Canada, the prevalence of Vitamin D insufficiency is approximately 34-50%. The goal of the proposed study is to determine the prevalence of vitamin D insufficiency in an infertile population and whether this prevalence is higher than in average Canadian reproductive age women. More importantly, we will investigate whether vitamin D insufficiency in our infertile population translates to impaired implantation and reduced clinical pregnancy rates. Insight into vitamin D's role in reproduction is essential not only to provide scientific understanding of the mechanism underlying embryo implantation, but also because vitamin D supplementation could provide an easy and safe means of treating infertility.


Eligibility criteria: Inclusion Criteria:

* Age \> 18, \< 40
* Day 3 FSH \< 10
* Capable of providing informed consent

Exclusion Criteria:

* BMI \> 35
* Untreated uterine pathology ie. fibroids, septum, polyps
* Unable to provide informed consent

Primary outcomes:
measure: implantation rates following IVF
timeFrame: 3 weeks
Secondary outcomes:
measure: clinical pregnancy rates following IVF
timeFrame: 3 weeks
Other outcomes:
Locations:
city: Toronto
country: Canada
facility: Centre for Fertility and Reproductive Health, Mount Sinai Hospital
state: Ontario
Study officials:
affiliation: Mount Sinai Hospital, University of Toronto
name: Kimberly Liu, MD FRCSC
role: PRINCIPAL_INVESTIGATOR
References:
citation: Garbedian K, Boggild M, Moody J, Liu KE. Effect of vitamin D status on clinical pregnancy rates following in vitro fertilization. CMAJ Open. 2013 Jun 28;1(2):E77-82. doi: 10.9778/cmajo.20120032. eCollection 2013 May.