diff --git a/src/js/physicalDevelopment.js b/src/js/physicalDevelopment.js
index a4bee9e7264acead19d8b37b60e62bd2e97a3d80..7559b534c596d1c65dbc1d27e3f93c8acabc38ee 100644
--- a/src/js/physicalDevelopment.js
+++ b/src/js/physicalDevelopment.js
@@ -1969,7 +1969,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 20) {
 						slave.hips++;
@@ -2043,7 +2043,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 40) {
 						slave.hips++;
@@ -2075,7 +2075,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 95) {
 						slave.hips++;
@@ -2107,7 +2107,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 90) {
 						slave.hips++;
@@ -2145,7 +2145,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 60) {
 						slave.hips++;
@@ -2226,7 +2226,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 20) {
 						slave.hips++;
@@ -2300,7 +2300,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 40) {
 						slave.hips++;
@@ -2322,7 +2322,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 95) {
 						slave.hips++;
@@ -2336,7 +2336,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 						slave.hips++;
 					}
 				}
-			} else if (geneticQuirks.uterineHypersensitivity === 2) {
+			} else if (geneticQuirks.uterineHypersensitivity === 2 && slave.physicalAge > 9) {
 				if (slave.hips < 3) {
 					if (jsRandom(1, 100) > 60) {
 						slave.hips++;