Hello there, thanks for your query. Your efforts in researching for scientific literature is commendable. As you have rightly found out there are not much studies regarding pityriasis rosea in pregnancy. Those reports suggest possible miscarriage, premature delivery, movement issues in the baby. It is very difficult to draw conclusions from a single study which includes a very limited number of patients and hence the inference cannot be generalised. What one can do in such a circumstance is adopt a wait and watch policy and take adequate precautions to prevent miscarriage and preterm delivery. And undergo a detailed genetic sonogram (anomaly scan) to rule out structural defects in the baby. It usually starts as a single oval patch with well demarcated red boundary and central pink region which over 2 weeks spreads to trunk, back, neck and extremities and they are oval raised lesions which would look like Christmas tree. It spares face, feet and palms. Whereas puppp is seen in the last trimester of pregnancy and seen as papules along lines of striae over abdomen and thighs and it gets intensely itchy. It is most likely related to stretching of the skin. I would like to add that i have given gross features of PR and it should not be used to diagnose the lesion by oneself. Pityriasis rosea should be diagnosed by a trained dermatologist who does job at their best and the management in pregnancy should be a team work comprising of your obstetrician and dermatologist and a good radiologist.Hope this information is helpful to you. Take care.