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The role of stimulation protocol, number of oocytes retrieved with respect to follicular fluid oxidative stress and IVF outcome.
Human Fertility : Journal of the British Fertility Society 2019 January 9
The study was conducted on a population of 203 women attending the IVF clinic, Ahmedabad, India, to explore the role of stimulation protocol and the number of oocytes retrieved on oxidative stress in follicular fluid and IVF outcome. Follicular fluid was collected during ovum pick-up to determine the oxidative stress markers: superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), total thiols (TT), l-ascorbic acid (AA), total protein, glutathione S-transferase (GST) and glutathione reductase (GRD). The average number of oocytes retrieved was significantly higher in the women receiving a long GnRH agonist protocol compared to GnRH antagonist protocol while the percentage of women with positive IVF outcome was lower in the long agonist protocol. The level of total thiols was significantly lower in the group of women administered a short agonist protocol. The proportion of ETs carried out and positive IVF outcome were higher following retrieval of an intermediate number of oocytes (6-10 oocytes) compared to a lower (0-5 oocytes) and higher (>10 oocytes) number. Mean glutathione reductase (GRD) activity in follicular fluid was significantly elevated in the intermediate (6-10) and higher (>10) oocyte retrieval groups compared to the lower oocyte retrieval group. Positive IVF outcomes were highest when oocyte retrieval was in the range of 6-10 oocytes, and the level of MDA was lower (1.76 ± 0.13 nmol/ml) as compared to 0-5 and >10 oocytes retrieved groups.
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