The four surviving sextuplets born Jan. 10 in the western Mexican city of Morelia remain in critical condition, the Michoacan state health department said.

Rosalba Martinez Luviano, a neonatologist at the Morelia Women's Hospital, said that two of the four infants are receiving breathing assistance and are at risk of dying, according to a statement issued by the department.

The two who are breathing on their own cannot be said to be in stable condition due to their extremely premature birth and the pulmonary damage from which they are suffering, she added.

On Jan. 11, the health department reported that a woman had given birth the day before to four girls and two boys, all of whom were in "unstable" condition at the Women's Hospital.

Hospital director Yara Pineda acknowledged at the time that the condition of the babies was "delicate due to their lack of weight, their pulmonary immaturity and all the complications linked to the mechanical ventilation."

In addition, she warned that if they survived they could suffer from neurological, respiratory or cardiovascular problems.

She said that the mother, Salud Romero Ruiz, was suffering from anemia with detachment of the placenta due to the fact that doctors had to perform a Caesarean in her 27th week of pregnancy given that her condition was assessed as being high-risk. EFE