diff --git a/slave variables documentation - Pregmod.txt b/slave variables documentation - Pregmod.txt
index db216a2c4d5a83803c8efe5eec3e7e866e7bf8c6..707b595b682d6379143a07acb40dd438e5ee66a2 100644
--- a/slave variables documentation - Pregmod.txt	
+++ b/slave variables documentation - Pregmod.txt	
@@ -1,5 +1,4 @@
-
-**anything labeled accepts string will return any string entered into it**
+anything labeled accepts string will return any string entered into it**
 
 slaveName:
 
@@ -1722,17 +1721,33 @@ readyOva:
 
 Number of ready to be impregnated ova (override normal cases), default - 0. For delayed impregnations with multiples. Used onetime on next call of the SetPregType widget. After SetPregType use it to override .pregType, it set back to 0 automatically.
 
-broodmother
+superfetation:
+
+Superfetation is condition when pregnancy not block ovulation cycle, so further, second and more impregnantion possible when alredy pregnant. Very rare IRL.
+0 - no
+1 - condition present
+
+ovaImplant:
+
+Ovary implant state and type.
+
+-1 - present, supress natural superfetation (normalize slave with natural superfetation), still allow partial birth.
+0 - no implant
+1 - artifical superfetation and partial birth support.
+2 - ova release on orgasm and partial birth support.  
+
+broodmother:
 
 has the slave been turned into a broodmother
 0 - no
 1 - standard 1 birth/week
 2 - black market 12 births/week
+3 - black market upgrade for implant firmware, to allow change weekly number of ova in range of 1 to 12 in remote surgery block. (broodmotherFetuses change through remote surgery).
 
-broodmotherFetuses
+broodmotherFetuses:
 count of ova that broodmother implant force to release. Should be setted with "broodmother" property together. If broodmother == 0 has no meaning.
 
-broodmotherOnHold
+broodmotherOnHold:
 
 If broodmother implant set to pause it's work.
 1 - implant on pause
diff --git a/src/js/storyJS.tw b/src/js/storyJS.tw
index cb19ff15d1a2fa9cff7142d7f5ea680c705eed1b..ea119fc07877cd1e507dda3466b436959fb1bc50 100644
--- a/src/js/storyJS.tw
+++ b/src/js/storyJS.tw
@@ -311,9 +311,9 @@ window.isFertile = function(slave) {
 
 	WombInit(slave);
 
-	if (slave.womb.length > 0 && slave.superfetation < 1) { /* currently pregnant without superfetation */
+	if (slave.womb.length > 0 && slave.superfetation < 1 && slave.ovaImplant < 1) { /* currently pregnant without superfetation */
 		return false;
-	} else if ( slave.broodmother > 0) { /* currently broodmother */
+	} else if (slave.broodmother > 0) { /* currently broodmother */
 		return false;
 	} else if (slave.preg < -1) { /* sterile */
 		return false;