academic.oup.com Semantic Scholar (全网免费下载) dx.doi.org BioOne NCBI 查看更多 Europe PMC Oxford Univ Press Oxford Univ Press (全网免费下载) ResearchGate (全网免费下载) ResearchGate ProQuest EBSCO readcube.com deepdyve.com bprcem.com cdfd.org.in (全网免费下载) cdfd.org.in (全网免费下载) biolreprod.org theriojournal.com iv.iiarjournals.org fertstert.org physiolgenomics.physiology.org reproduction-online.org dev.biologists.org mendeley.com cifd.org (全网免费下载) in.embnet.org (全网免费下载)