Heated and Non Heated Ovarian Aspiration Needle Protocol
Study Details
Study Description
Brief Summary
The success of IVF is influenced by factors as cause of infertility and age. Furthermore, there is a large influence of external factors, from the laboratory environment, handling and cultivation of gametes and embryos. The existence of factors capable of affecting the success of the treatment lead to the need of a quality control to attenuate the unfavorable effects.
After ovarian stimulation, follicular aspiration is performed. At this moment, factors such as aspiration technique, needle type and temperature are the main variables to be controlled. It is known that oocytes are the more sensitive cells to temperature fluctuations. Currently, the standard protocol for follicular aspiration does not include the warming of the aspiration needle. However, due to the existing evidence in the literature, that the follicular fluid temperature drops during the aspiration procedure, this work aims to evaluate the influence of a pre warming of the aspiration needle as a new protocol.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
The estimated sample was 600 oocytes for each group, totaling a minimum of 1200 oocytes, considering a fertilization rate of 65% in the control group and 73% in the study group, for a power of 80% and p alpha 5%, i.e. , an increase of more than 10% between groups. As there is no data in the literature, when the investigators have this sample an interim analysis to evaluate the data will be performed. The investigators consider 10% a reasonable difference that can (with this sample size) increase by 48 embryos and a possible increase of 7 pregnancies within this sample. Bearing in mind that the average number of oocytes retrieved per patient is 6 oocytes, the investigators estimate that 200 patients will be needed to reach the calculated sample number.
The warm-up protocol will be applied by the embryologists, which consists of heating the follicular aspiration needle to 37 Celsius, overnight, the day before the day of the ovarian aspiration procedure.
The variables that will be compared between the studied groups are the rates of oocyte retrieval, maturity (MII), fracture, atresia, fertilization rates and discarded embryos.
Continuous variables will be analyzed using Student's t test if they have normal distribution, for comparison of means between two independent groups or the Wilcoxon-Mann-Whitney U test if not parametric. Differences between groups will be considered significant when p<0.05.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| No Intervention: Standard protocol The standard protocol comprises no heating of the aspiration needle. |
|
| Experimental: Warming protocol The aspiration needle will be warm-up overnight the day before the oocyte pick-up procedure |
Other: warming of the follicular aspiration needle
the follicular aspiration needle will be heated overnight before the ovarian aspiration procedure.
|
Outcome Measures
Primary Outcome Measures
- normal fertilization rate [16 to 18 hours after fertilization procedure]
Fertilization will be confirmed through the visualization of the presence of two pronuclei
Secondary Outcome Measures
- number of oocyte retrieved [immediately after ovarian aspiration procedure]
the total number of oocytes captured in the ovarian aspiration procedure
- number of mature oocyte [3 hours post ovarian aspiration]
total number of MII
- oocyte damage rate [3 hours post ovarian aspiration]
the number of fractured oocytes or atresia
- abnormal fertilization rate [16 to 18 hours after fertilization procedure]
the total number of zygotes with three or more pronuclei
Eligibility Criteria
Criteria
Inclusion Criteria:
- All women submitted to IVF cycles
Exclusion Criteria:
-
Women submitted to follicular aspiration due to oocyte cryopreservation
-
Patients without oocyte retrieved
-
Patients without mature oocyte retrieved
-
Procedures with needle replacement
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Insemine Human Reproduction Centre | Porto Alegre | Rio Grande Do Sul | Brazil | 91330-001 |
Sponsors and Collaborators
- Hospital de Clinicas de Porto Alegre
- Guedes da Luz Médicos Associados Sociedade Simples LTDA
Investigators
- Study Director: João da Cunha Filho, PhD, Hospital de Clínicas de Porto Alegre
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- 60504522.7.0000.5327