diff --git a/src/js/wombJS.js b/src/js/wombJS.js
index 6d4022a699cf5bf612e6b388f6ace11ef7c155a2..d35de1ff28676befeae3e0b430b3dc5aa62cdf84 100644
--- a/src/js/wombJS.js
+++ b/src/js/wombJS.js
@@ -190,11 +190,11 @@ window.WombImpregnateClone = function(actor, fCount, mother, motherOriginal, age
 };
 
 // Should be used to set biological age for fetus (ageToAdd), AND chronological (realAgeToAdd). Speed up or slow down gestation drugs should affect ONLY biological.
-window.WombProgress = function(actor, ageToAdd, realAgeToAdd) {
+window.WombProgress = function(actor, ageToAdd, realAgeToAdd=ageToAdd) {
 	ageToAdd = Math.ceil(ageToAdd*10)/10;
 	realAgeToAdd = Math.ceil(realAgeToAdd*10)/10;
 	try {
-		actor.womb.forEach(ft => ft.age += ageToAdd, ft.realAge += realAgeToAdd );
+		actor.womb.forEach(ft => {ft.age += ageToAdd; ft.realAge += realAgeToAdd});
 	} catch(err){
 		WombInit(actor);
 		alert("WombProgress warning - " + actor.slaveName+" "+err);