Hemoperitoneum in the neonate is quite uncommon and the spontaneous type is even most uncommon.It would be interesting to report yours as a case report as there is little known published works on this.

@ Francis Akor : Thank you very much . We will publish it . 

hemoperitoneum in the neonate may occur post adrenal gland heamoragia (especially infant of diabetic mother)

In addition complication of umblical chatetherization

Perforated meckels diverticulum.

Perforated umbilical vessels - both vein and artery - during catheterisation 

Any hemoperitoneum needs complete hematological workup for bleeding disorders and an exploratory laparotomy to identify the cause. What was the laparotomy finding? Was the clotting profile normal?

Clotting profile was normal except platelet of 120000/mm3. There were 200 ml blood intra peritoneally .

which organ was the source of bleeding? Was a laparotomy done? If so, what was the finding? Without meticulous exploratory laparotomy one cannot call it as primary or idiopathic bleeding.

There were subcapsular splenic haematoma which is the most probable source of bleeding . But there were no active bleeders at the time of laparotomy . 200 ml of intraperitoneal clotted blood were there . There were no perinatal or antenatal complications . In 2 weeks follow up clotting screening was normal .

hemoperitoneum in neonates is very rare even in difficult deliveries. i have noted only one caes due to liver injury  due to difficult home delivery, baby was receivet in hospital with shock and anemi, and died before any intervention could be done

Subcapsular hematoma is the key. Information are in bits and pieces to give concrete comment. However, splenic and liver trauma during delivery is well known. They have even occurred in vaginal delivery of otherwise healthy newborn. Spleen and liver also become too friable in necrotizing enterocolitis. In the case noted above it appears unrecognized birth injury be the cause of hemoperitoneum. There is nothing called idiopathic in medicine  - it simply means that we have not understood something well.. A through workup will always show the underlying cause.