Kirk, E.; Bottomley, C.; Bourne, T. (2013). "Diagnosing ectopic pregnancy and current concepts in the management of pregnancy of unknown location". Human Reproduction Update. 20 (2): 250–61. PMID24101604. डीओआइ:10.1093/humupd/dmt047.
nih.gov
pubmed.ncbi.nlm.nih.gov
Kirk, E.; Bottomley, C.; Bourne, T. (2013). "Diagnosing ectopic pregnancy and current concepts in the management of pregnancy of unknown location". Human Reproduction Update. 20 (2): 250–61. PMID24101604. डीओआइ:10.1093/humupd/dmt047.