Abstract
Background
The normal physiological function of LH requires a certain concentration range, but because of pituitary desensitization, even on the HCG day, endogenous levels of LH are low in the follicular-phase long protocol. So our study aimed to determine whether it is necessary to monitor serum LH concentrations and to determine whether there is an optimal LH range to achieve the desired clinical outcome.
Methods
A retrospective cohort study included 4503 cycles of in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) units from January 1, 2016, to June 30, 2019, in a single department. The main outcome measures included retrieved eggs, available embryos, live birth rate.
Results
Divided the LHHCG into five groups: Group A (LH ≤ 0.5), Group B (0.5 IU/L < LH ≤ 1.2 IU/L), Group C (1.2 IU/L < LH ≤ 2.0 IU/L), Group D (2.0 IU/L < LH ≤ 5.0 IU/L), Group E (LH > 5 IU/L). In terms of the numbers of retrieved eggs, embryos, high-quality embryos and diploid fertilized oocytes, an increase of the LHHCG level showed a trend of a gradual decrease. However, there was no significant difference in clinical outcomes among the groups.By adjusting for confounding factors, with an increase in LHHCG, the number of retrieved eggs decreased.
Conclusion
In the follicular-phase long protocol among young women, monitoring of LHHCG are recommended in the clinical guidelines. What’s more, those who undergo Preimplantation Genetic Testing(PGT) may benefit more when the LH level is controlled within a certain range.
Does model of maternity care make a difference to birth outcomes for young women? A retrospective cohort study
