Step 1: Understand what a primary health centre can and cannot do.
A primary health centre (PHC) usually lacks facilities for continuous fetal and maternal monitoring, magnesium sulphate protocols, and emergency obstetric surgery. Eclampsia needs a facility with a labor ward, anesthesia backup, and newborn care, none of which a PHC is built for.
Step 2: Decide the first priority.
The first job at the PHC is to stop the fit and prevent another one before the woman is moved, because a convulsion during transport is dangerous for both mother and baby. A quick acting anticonvulsant is needed right there.
Step 3: Why diazepam and not just referral.
Sending her off with only advice to go to a referral hospital, without giving anything first, risks another seizure on the way. Diazepam (Calmpose) 10 mg given intravenously acts fast and controls the seizure for the time it takes to reach a higher centre.
Step 4: Why not induce labor at the PHC.
Inducing labor and delivering at a PHC ignores the fact that eclampsia can bring complications during delivery, such as bleeding or the need for an operative delivery, which the PHC cannot manage safely.
Step 5: Why not just start anticonvulsants and wait.
Waiting at the PHC for transport, even after starting treatment, keeps the woman in a place without monitoring facilities for longer than needed. The safer plan is to give the sedative dose and move her without delay.
Final Answer:
The right step is to control the seizure with IV diazepam and send her to a higher centre right away.
\[ \boxed{\text{Give 10 mg Calmpose IV and refer to a higher centre}} \]