Study finds COVID associated with abnormal placental pathologies in nearly 50% of cohort


The continuing coronavirus illness 2019 (COVID-19) pandemic, which is brought on by the extreme acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has considerably affected the worldwide healthcare sector and economic system. Thus far, SARS-CoV-2 has contaminated over 584 million and claimed greater than 6.41 million lives worldwide.

Researchers have labored at an unprecedented pace to research varied points of COVID-19 in an effort to design efficient pharmaceutical and non-pharmaceutical measures to guard people from this illness.

Examine: The placental pathology in Coronavirus disease 2019 infected mothers and its impact on pregnancy outcome. Picture Credit score: SciePro /


Being pregnant induces an immunocompromised state within the mom, thereby making her extra susceptible to viral respiratory infections. Earlier research have revealed that the placenta, which supplies vitamins to the fetus, reveals an attenuated immune response and hosts many viral infections.

Some maternal circumstances that may have an effect on being pregnant outcomes embrace inflammatory activation, hypoxia, and elevated thrombotic occasions secondary to COVID-19. Though the placental options in COVID-19 have been described, there stays an absence of proof concerning the attribute pathological outcomes related to placental pathologies ensuing from COVID-19. 

In regards to the research

In a current Placenta journal research, researchers describe the affect of placental morphological modifications in COVID-19 on being pregnant outcomes.

The present research was carried out on the Postgraduate Institute of Medical Sciences and Analysis (PGIMER), Chandigarh, India, between July 1, 2020, and June 30, 2021. Pregnant girls with COVID-19 who delivered at PGIMER had been included within the research. 

All pregnant girls examined optimistic for COVID-19 as confirmed by reverse transcription-polymerase chain response (RT-PCR) assay or GeneXpert Dx Xpress SARSCoV-2 RT-PCR assay. Solely girls who delivered at greater than 20 weeks of gestation had been included within the research cohort.

Related knowledge akin to demographic traits, mode of supply, COVID-19 severity, obstetrical problems, maternal mortality, and neonatal particulars of chosen candidates had been assessed.

Examine findings

A complete of 179 placentae obtained from 170 members had been analyzed within the present research. Over 49% of placentae exhibited a minimum of one irregular characteristic based mostly on histopathological examination (HPE).

Extra particularly, nearly 28% exhibited maternal vascular malformation, which was adopted by villous fibrin deposition, fetal vasculopathy, and acute irritation at charges of about 23%, 17%, and seven%, respectively. These findings are in keeping with earlier experiences that exposed the vast majority of placental abnormalities had been linked with fetal vasculopathy, adopted by villitis, intervillositis, and chorioamnionitis.

The presence of placental abnormalities was not associated to COVID-19 severity. In distinction to earlier research, the chance of preeclampsia or clinically detected abruptio placentae was not elevated in moms with irregular placental pathologies. 

Placental morphologic examination revealed an elevated incidence of retroplacental (RP) clots/hemorrhages. This is perhaps because of silent antepartum hemorrhages brought on by COVID-19.

Being pregnant outcomes had been in contrast between COVID-19-positive moms with irregular placental morphology and COVID-19-positive moms with regular placental morphology.

To this finish, an elevated danger of stillbirths was noticed in COVID-19 moms with irregular placentae. These stillbirths had been clinically unexplained, as clinicians didn’t observe the incidence of pre-eclampsia, fetal progress restriction (FGR), intrahepatic cholestasis of pregnancy (ICP), or abruptio placentae.

Infants born to SARS-CoV-2-infected moms with irregular placental morphologic options exhibited considerably decrease Apgar scores at one minute and 5 minutes, which signifies the general well being of a new child. Nonetheless, decrease Apgar scores didn’t have an effect on NICU admissions.

Nonetheless, a major correlation was noticed between RP clot/hemorrhage and intervillous fibrin deposition at decrease Apgar scores. 

A scientific enhancement in thrombotic occasions and microvascular harm syndrome on account of COVID-19 would possibly have an effect on the placenta. This might result in speedy or sluggish blood move, decreased fibrinolysis, elevated ranges of fibrin degradation merchandise, and elevated hypoxic-ischemic harm.


Taken collectively, 50% of the research members’ placentae exhibited irregular morphologic options. Moreover, pregnant girls with COVID-19 and irregular placental morphologies had been related to poor being pregnant outcomes. 

The present research is probably going the primary to correlate placental morphological options in COVID-19-positive pregnant girls with being pregnant outcomes. A key energy of this research is its giant cohort.

Nonetheless, one of many key limitations is that the research findings weren’t in contrast with non-COVID-19 controls. Because of this, the scientists failed to verify that every one placental modifications and being pregnant outcomes had been solely associated to COVID-19 moderately than another elements.

Sooner or later, extra analysis is required to elucidate the impact of the SARS-CoV-2 burden on the extent of the placental harm.

Journal reference:

  • Joshi, B., Chandi, A., Srinvasan, R., et al. (2022). The placental pathology in Coronavirus illness 2019 contaminated moms and its affect on being pregnant final result. Placenta 127(1-7). doi:10.1016/j.placenta.2022.07.009
Leave A Reply