OOIR: Observatory of International Research

Papers

(The H4-Index of Human Reproduction Open is 23. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-09-01 to 2025-09-01.)

Article	Citations
Gamete donation: anti-anonymity does not equate to anti-donation	902
Risk factors associated with monozygotic twinning in offspring conceived by assisted reproductive technology	239
Outcome reporting across randomized controlled trials evaluating potential treatments for male infertility: a systematic review	147
Extracellular vesicles secreted by human aneuploid embryos present a distinct transcriptomic profile and upregulate MUC1 transcription in decidualised endometrial stromal cells	145
Defending access to reproductive health information	130
The microbiome in reproductive health: protocol for a systems biology approach using a prospective, observational study design	99
Pregnancy and perinatal outcomes after modified natural cycle-frozen embryo transfers according to size of the dominant follicle on the hCG trigger day	89
In infertile women with subclinical hypothyroidism, with or without thyroid peroxidase antibodies, serum TSH during pregnancy follows preconception values and thyroid hormones remain stable	72
Biallelic mutations in RNA-binding protein ADAD2 cause spermiogenic failure and non-obstructive azoospermia in humans	66
Health-related quality of life in women with endometriosis: psychometric validation of the Endometriosis Health Profile 30 questionnaire using confirmatory factor analysis	55
A comprehensive study of common and rare genetic variants in spermatogenesis-related loci identifies new risk factors for idiopathic severe spermatogenic failure	43
Blastocyst telomere length predicts successful implantation after frozen-thawed embryo transfer	43
Birth outcomes in mothers with hypertensive disorders and polycystic ovary syndrome: a population-based cohort study	41
Ovarian ferroptosis induced by androgen is involved in pathogenesis of PCOS	40
Current global status of male reproductive health	40
Why the hypothesis of embryo selection in IVF/ICSI must finally be reconsidered	37
Multi-omics analysis of uterine fluid extracellular vesicles reveals a resemblance with endometrial tissue across the menstrual cycle: biological and translational insights	37
Effects of different embryo culture media on birthweight following assisted reproductive technology	36
The role of endometrial B cells in normal endometrium and benign female reproductive pathologies: a systematic review	35
Automatic identification of human spermatozoa with zona pellucida-binding capability using deep learning	30
No difference in cumulative live birth rates between cleavage versus blastocyst transfer in patients with four or fewer zygotes: results from a retrospective study	25
Independent factors associated with intracytoplasmic sperm injection outcomes in patients with complete azoospermia factor c microdeletions	24
Protocol for developing a core outcome set for male infertility research: an international consensus development study	23
Phytochemical consumption and the risk of teratozoospermia: findings from a hospital-based case–control study in China	23
Effects of maternal poor ovarian response on the reproductive endocrine profiles of the next generation: a prospective cohort study in China	23