Potential implications of SARS-CoV-2 on pregnancy.

Dear Editor,

The Wuhan Coronavirus (recently named SARS-CoV-2) has been making headline news around the world as there are over 60,000 confirmed cases and a total of over 1300 deaths in China alone since the start of the outbreak [1]. The World Health Organization has declared a global emergency as they are trying to control this outbreak. Over 28 countries and territories around the world has been affected but mainly in Asia.

The 21st century has brought us three novel coronavirus causing fatality on a large scale – SARS (severe acute respiratory syndrome) in 2003, MERS (Middle East respiratory syndrome) in 2012, and now the novel coronavirus from Wuhan [2]. As to date, there are only limited data on the consequences of this coronavirus on pregnancy. However, SARS and MERS are responsible for severe complications during pregnancy [3,4].

In a review of previous coronavirus infections in pregnancy, there were 13 cases of SARS-CoV and 11 cases of MERS-CoV reported in the literature [3,4]. Maternal outcome of the 13 cases: 4 cases had miscarriage, 2 opted for termination of pregnancy, 2 succumbed to SARS, 2 required mechanical ventilation, and 3 were treated conservatively. No neonatal adverse effect was noted except for 2 cases born prematurely – one at 28 weeks and the other at 26 weeks (Table 1 ). Maternal outcome of the 11 MERS-CoV cases: 2 were asymptomatic, 3 succumbed to MERS, 2 required mechanical ventilation, 3 were treated conservatively, and 1 refused treatment. No neonatal adverse effects were noted except for 2 intrauterine fetal demise (IUFD) (one at 38 weeks and the other at 20 weeks) and 1 fetal death due to prematurity at 24 weeks gestation (Table 2 ). The most important contributing factor for method of delivery in patients with SARS and MERS seems to be dependent on disease progression resulting in maternal hypoxia leading to fetal distress and prematurity. Neonatal infection due to possible vertical transmission was not detected in any of the SARS or MERS infection except for 1 SARS case in the United States where cord blood and breast milk were positive for the SARS-CoV antibody.

Table 1

SARS infection and maternal–fetal outcome.

Country	Case	Maternal		Newborn
		Complication	SARS-CoV Antibody	Delivery	Complication	SARS-CoV antibody
United States	1	Progressive Lung Infiltration s/p Mechanical Ventilation	Serum (+)	38 weeksCesareanPlacenta previa	No adverse effect	Cord blood (+)Placenta (−)Breast milk (+)Stool (−)
	2	Lung infiltration s/p antibiotics	Serum (+)	36 weeks CesareanFetal Distress	No adverse effect	Cord blood (−)Placenta (−)Breast milk (−)Stool (−)
Hong Kong	1	SARS fatality with MRSA pneumonia	Nasopharyngeal (+)	28 weeksCesareanFetal Distress	Necrotizing Enterocolitis with ileal perforation s/p laparotomy	Cord blood (−)Placenta (−)Stool (−)Peritoneal fluid (−)
	2	Lung infiltration s/p antibiotics	Stool (+)CSF (+)Peritoneal fluid (+)	26 weeksCesareanFetal Distress	Jejunal perforation s/p laparotomy	Cord blood (−)Placenta (−)Stool (−)Peritoneal fluid (−)
	3	SARS fatality	Stool (+)	32 weeksCesareanMaternal Hypoxia	No adverse effect	Cord blood (−)Placenta (−)Stool (−)
	4	Lung infiltration s/p antibiotics	Nasopharyngeal (+)	33 weeksXPreterm labor	No adverse effect	Cord blood (−)Placenta (−)Stool (−)
	5	Progressive Lung Infiltration s/p Mechanical Ventilation	Stool (+)	37 weeksNSD	No adverse effect	Cord blood (−)Placenta (−)Stool (−)
	Others	4 miscarriage2 termination

Table 2

MERS infection and maternal–fetal outcome.

Country	Cases	Maternal		Newborn
		Complication	MERS-CoV antibody	Delivery	Complication	MERS-CoV antibody
Saudi Arabia	1	Asymptomatic	Nasopharyngeal (+)	TermNSD	No Adverse Effects	X
	2	Asymptomatic	Nasopharyngeal (+)	TermNSD	No Adverse Effects	X
	3	Lung infiltration s/p antibiotics	Nasopharyngeal (+)	34 weeksInduction	IUFD	X
	4	MERS Fatality	Nasopharyngeal (+)	38 weeksNSD	No Adverse Effects	X
	5	MERS Fatality	Nasopharyngeal (+)	24 weeksCesareanMaternal Hypoxia	Preterm Expire	X
	6	Lung infiltration s/p antibiotics	Nasopharyngeal (+)	TermNSD	No Adverse Effect	X
	7	Progressive Lung Infiltration s/p Mechanical Ventilation	Nasopharyngeal (+)	TermNSD	No Adverse Effect	X
	8	Progressive Lung Infiltration s/p Mechanical Ventilation	Nasopharyngeal (+)	32 weeksCesareanMaternal Hypoxia	No Adverse Effect	X
Jordan	1	Refuse treatment	EIA (+)	20 weeksInduction	IUFD	X
United ArabEmirates	1	MERS Fatality	Nasopharyngeal (−)RT-PCR (+)	32 weeksCesareanMaternal Hypoxia	No Adverse Effects	X
South Korea	1	Lung infiltration s/p antibiotics	RT-PCR (+)	37 + 5 weeksCesareanPlacenta abruption	No Adverse Effects	Cord blood (−)Placenta (−)

As human-to-human transmission exponentially increases, the number of pregnant cases will eventually surface. In light of the new coronavirus (SARS-CoV-2) having similar pathogenic characteristics as SARS-CoV and MERS-CoV, pregnant women who become infected are at risk for adverse maternal and fetal complications [3,4]. Taking this into account, systemic screening of any suspected case is recommended and prompt referral to medical centers capable of handling and treating these cases is imperative.

Declaration of Competing Interest

The author declares no conflict of interest.