1. Rasmussen SA, Smulian JC, Lednicky JA, Wen TS, Jamieson DJ. Coronavirus Disease 2019 (COVID-19) and pregnancy: what obstetricians need to know. American Journal of Obstetrics and Gynecology. 2020;222(5):415-26. doi: 10.1016/j.ajog.2020.02.017. PubMed PMID: 32105680; PubMed Central PMCID: PMC7093856.## 2. Karimi-Zarchi M, Neamatzadeh H, Dastgheib SA, Abbasi H, Mirjalili SR, Behforouz A, et al. Vertical Transmission of Coronavirus Disease 19 (COVID-19) from Infected Pregnant Mothers to Neonates: A Review. Fetal and Pediatric Pathology. 2020;39(3):246-50. doi: 10.1080/15513815.2020.1747120. PubMed PMID: 32238084; PubMed Central PMCID: PMC7157948. ## 3. Di Mascio D, Khalil A, Saccone G, Rizzo G, Buca D, Liberati M, et al. Outcome of Coronavirus spectrum infections (SARS, MERS, COVID 1-19) during pregnancy: a systematic review and meta-analysis. Am J Obstet Gynecol MFM. 2020:100107. doi: 10.1016/j.ajogmf.2020.100107. PubMed PMID: 32292902; PubMed Central PMCID: PMC7104131. ## 4. Ashraf MA, Keshavarz P, Hosseinpour P, Erfani A, Roshanshad A, Pourdast A, et al. Coronavirus Disease 2019 (COVID-19): A Systematic Review of Pregnancy and the Possibility of Vertical Transmission. Journal of reproduction & infertility. 2020;21(3):157-68. ## 5. Kotlyar AM, Grechukhina O, Chen A, Popkhadze S, Grimshaw A, Tal O, et al. Vertical transmission of coronavirus disease 2019: a systematic review and meta-analysis. American Journal of Obstetrics and Gynecology. 2020. doi: 10.1016/j.ajog.2020.07.049. PubMed PMID: 32739398; PubMed Central PMCID: PMC7392880. ## 6. Chen H, Guo J, Wang C, Luo F, Yu X, Zhang W, et al. Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records. The Lancet. 2020;395(10226):809-15. doi:10.1016/S0140-6736(20)30360-3. ## 7. Tahamtan A, Ardebili A. Real-time RT-PCR in COVID-19 detection: issues affecting the results. Taylor & Francis; 2020. doi: 10.1080/14737159.2020.1757437. PubMed PMID: 32297805; PubMed Central PMCID: PMC7189409. ##