Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization
Background Effect of seasonal changes in human reproduction has been intensively researched. Some studies acknowledge influences of seasonal variation on natural conception, while others can not confirm them. The aim of this study was to investigate the effect of seasonal changes on different stages...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Royan Institute (ACECR), Tehran
2008-08-01
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| Series: | International Journal of Fertility and Sterility |
| Subjects: | |
| Online Access: | http://www.ijfs.ir/article_45717_2df7e6d6d3b64efd25eedd12650f80c5.pdf |
| _version_ | 1819225753472991232 |
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| author | Soraya Khafri Anoshirvan Kazemnejad Mansoureh Movahedin Ebrahim Hajizadeh |
| author_facet | Soraya Khafri Anoshirvan Kazemnejad Mansoureh Movahedin Ebrahim Hajizadeh |
| author_sort | Soraya Khafri |
| collection | DOAJ |
| description | Background
Effect of seasonal changes in human reproduction has been intensively researched. Some studies acknowledge influences of seasonal variation on natural conception, while others can not confirm them. The aim of this study was to investigate the effect of seasonal changes on different stages of assisted reproductive technology (ART) in Tehran.
Materials and methods
This study was carried out on 268 cycles which were the first intracytoplasmic sperm injection (ICSI) cycle of the couples between July 2005 and March 2007. Multiple logistic regression was used to model the influence of different clinical factors on pregnancy rate and a bivariate Poisson regression model was used for modeling the number of mature oocytes and obtained embryos.
Results
Based on the logistic regression model, the duration of infertility, female age, number of mature oocytes, and transferred embryos were only the significant predictors. In this series, seasonal changes had no predictive value on the pregnancy rate. Bivariate Poisson regression model showed that only the female age and duration of infertility were the factors simultaneously affecting the number of embryos and mature oocytes.
Conclusion
The suspected seasonal variability on the outcome of ICSI cycles has not been confirmed. Furthermore, among different seasons, there are no significant differences in the number of mature oocytes, obtained embryos, and transferred embryos. |
| first_indexed | 2024-12-23T10:14:36Z |
| format | Article |
| id | doaj.art-41400f6bb0604d1f8315b835b8ed7bc2 |
| institution | Directory Open Access Journal |
| issn | 2008-076X 2008-0778 |
| language | English |
| last_indexed | 2024-12-23T10:14:36Z |
| publishDate | 2008-08-01 |
| publisher | Royan Institute (ACECR), Tehran |
| record_format | Article |
| series | International Journal of Fertility and Sterility |
| spelling | doaj.art-41400f6bb0604d1f8315b835b8ed7bc22022-12-21T17:50:51ZengRoyan Institute (ACECR), TehranInternational Journal of Fertility and Sterility2008-076X2008-07782008-08-0122909510.22074/ijfs.2008.4571745717Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and FertilizationSoraya Khafri0Anoshirvan Kazemnejad1Mansoureh Movahedin2Ebrahim Hajizadeh3Biostatistics Department, Tarbiat Modares University ,Tehran, IranBiostatistics Department, Tarbiat Modares University ,Tehran, IranAnatomy Department, Tarbiat Modares University, Tehran, IranBiostatistics Department, Tarbiat Modares University ,Tehran, IranBackground Effect of seasonal changes in human reproduction has been intensively researched. Some studies acknowledge influences of seasonal variation on natural conception, while others can not confirm them. The aim of this study was to investigate the effect of seasonal changes on different stages of assisted reproductive technology (ART) in Tehran. Materials and methods This study was carried out on 268 cycles which were the first intracytoplasmic sperm injection (ICSI) cycle of the couples between July 2005 and March 2007. Multiple logistic regression was used to model the influence of different clinical factors on pregnancy rate and a bivariate Poisson regression model was used for modeling the number of mature oocytes and obtained embryos. Results Based on the logistic regression model, the duration of infertility, female age, number of mature oocytes, and transferred embryos were only the significant predictors. In this series, seasonal changes had no predictive value on the pregnancy rate. Bivariate Poisson regression model showed that only the female age and duration of infertility were the factors simultaneously affecting the number of embryos and mature oocytes. Conclusion The suspected seasonal variability on the outcome of ICSI cycles has not been confirmed. Furthermore, among different seasons, there are no significant differences in the number of mature oocytes, obtained embryos, and transferred embryos.http://www.ijfs.ir/article_45717_2df7e6d6d3b64efd25eedd12650f80c5.pdfoocyteembryosicsipregnancy ratesseasonal variation |
| spellingShingle | Soraya Khafri Anoshirvan Kazemnejad Mansoureh Movahedin Ebrahim Hajizadeh Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization International Journal of Fertility and Sterility oocyte embryos icsi pregnancy rates seasonal variation |
| title | Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization |
| title_full | Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization |
| title_fullStr | Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization |
| title_full_unstemmed | Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization |
| title_short | Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization |
| title_sort | seasonal influences on different stages of in vitro fertilization stimulation and fertilization |
| topic | oocyte embryos icsi pregnancy rates seasonal variation |
| url | http://www.ijfs.ir/article_45717_2df7e6d6d3b64efd25eedd12650f80c5.pdf |
| work_keys_str_mv | AT sorayakhafri seasonalinfluencesondifferentstagesofinvitrofertilizationstimulationandfertilization AT anoshirvankazemnejad seasonalinfluencesondifferentstagesofinvitrofertilizationstimulationandfertilization AT mansourehmovahedin seasonalinfluencesondifferentstagesofinvitrofertilizationstimulationandfertilization AT ebrahimhajizadeh seasonalinfluencesondifferentstagesofinvitrofertilizationstimulationandfertilization |