Effect of semen collection location on semen parameters and fertility outcomes and implications for practice in the COVID-19 era: a systematic review and meta-analysis of randomized and observational studies

精液采集地点对精液参数和生育结局的影响及其在新冠疫情时代实践中的意义：一项随机对照试验和观察性研究的系统评价和荟萃分析