Obstetricians have been told to monitor pregnant women who have had Covid-19.
It's emerged that four women may have had stillbirths as a result of a condition linked to the virus.
Two of the women are based in the east of the country and two are based in the south.
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But Dr Ronan Glynn says the details around the stillbirths have not yet been confirmed.
He says officials will wait for more information before changing any health advice.
