The IUD emits a progestin that thickens the cervical mucus, making it impenetrable to sperm.
Introduced by Berlex Laboratories (now Bayer HealthCare Pharmaceuticals), the intrauterine device Mirena emitted a progestin for five years that thickened the cervical mucus, making it impenetrable to sperm.
Additionally, by preparing the contrast agent to a suitable viscosity, making it impenetrable to the capillary barrier, either the arterial or the venous side of the vasculature can be visualised separately as exemplified by the MRI venography of the red-eared slider (Figure 1c).
However, for many, the "dense" way material is presented in many textbooks can make it almost impenetrable, so this may not be a great use of your test prep time.
The shortened version is lovely to look at, but the stilted dialogue and crude overdubbing in scenes where English is not spoken often make it an impenetrable hodgepodge.
Elias scored 2 30 into the third period to make it 5-3, but Cam Ward was impenetrable after that in his third straight win.
In recent months, armed gangs have taken over Cité Soleil, making it all but impenetrable to peacekeepers and aid workers.
Awaiting their arrival, a half dozen police officers swiftly took them off the train — part of France's efforts to make its border impenetrable to the thousands of migrants, mostly Tunisian right now, who have slowly made their way up from the southern Italian island of Lampedusa off Sicily since a wave of rebellion began sweeping across North Africa in January.
They also say the measurement process is impenetrable, making it difficult to understand how companies with serious social or environmental impacts could be highly rated.
Many untreated depressives lack friends because it saps the vitality that friendship requires and immures its victims in an impenetrable sheath, making it hard for them to speak or hear words of comfort.
