hey everyone it's sarah thread sterner sorry and calm and in this review we're going to talk about gravity and parity and as always whenever you get done watching this YouTube video you can access the free quiz that will test you over this content so let's get started what is gravity and parity well these are terms that we use in maternity nursing to help us assess a patient's health history specifically their OB history now there's two systems we can use to help us to do that one of the systems is a 5-digit system known as the gtp al and I have a review on that if you want to check that out in this system that we're talking about in this review is the two digit system hence we're just talking about gravity and parity so for exams what you want to know about this is you want to be able to differentiate between their definitions now what each of these mean also be familiar with the terms that fall under each and be able to calculate the gravity and the parody based on a scenario that you're given like a lot of times the scenarios will be a health history of a woman's OB history and you'll have to be able to calculate the gravity' and the para which we're going to do in this video so first gravity this is the number of times a woman has been pregnant so whenever you are calculating the gravity you want to take some things into account number one the outcome of that pregnancy isn't really relevant it doesn't matter if the baby survived or she lost the baby we for this we care about how many times she has been pregnant and this is actually going to include her current pregnancy so you're interviewing her and she's currently pregnant that is going to count in this and what do you do about if she is having twins that would just count as one multiple babies counts as one whenever you're calculating the gravity we're not calculating the number of babies she's having it's just one pregnancy then parity is the number of births or completed pregnancies that woman has had at 20 weeks gestation or greater so what we're talking about is the woman has completed the pregnancy meaning she's delivered the baby it has left her body and we're talking about at 20 weeks or greater so keep those two parts of this definition in mind so you don't get confused between these two and some things what you want to keep in mind is that this includes babies who are born alive or still more and they didn't make it in this calculation and how would we calculate multiple babies so let's say she had twins at 37 weeks she delivered that pregnancy is completed well we would count that as one we're not calculating it based on how many babies she delivered so keep that in mind because scenarios will throw out twins or triplets to you and you want to be able to calculate those terms correctly now let's look at the terms that are used to describe gravity and parity so another way of saying gravity is gravity' and another way of saying parity is para so as you can see with these terms they look similar they share the same prefix but their suffix is different so if you can understand what that prefix is and apply it to the definition of the suffix it'll be really easy solving these terms so first let's review the prefixes nulli means none or never prime e means first and molta means many like multiple so if we take those prefixes apply it to these words this is what we get so whenever we're talking about gravity' we can describe a woman as nollie gravity' what a gravity' mean it means the number of times a woman has been pregnant so nulli means none never so this woman has never been pregnant primate gravity' means that the woman has been pregnant once or she is currently pregnant with her first pregnancy Multi gravity' means that the woman has been pregnant at least two or more times so she's been pregnant more than once then we go to para we have no lis para what did para mean again it's the number of times a woman has completed or gave birth to a baby at 20 weeks gestation or more so no lis para would mean that she has never given birth or completed a pregnancy at 20 weeks or greater prime e para would mean that the woman has completed one pregnancy at twenty weeks or greater and then multi para would mean that she has completed at least two or more pregnancies at twenty weeks or greater shows so she's completed more than one now let's apply what we have learned to some scenarios so we're collecting health history on some patients and this patient tells us that she has been pregnant three times she's not currently pregnant and out of those three pregnancies only one did she have where she gave birth completed the pregnancy at 39 weeks the other two it was less than 20 weeks gestation when those pregnancies completed so let's calculate her gravity and parity so gravity' what would that be that's the number of times that she has been pregnant she's not currently pregnant but she has been pregnant three times so gravity' would be three okay what would her para be this is the number of times that she is completed gave birth to a baby at 20 weeks gestation or more she tells us only one it was at 39 weeks the other two it was less than 20 so her para would be 1 now let's look at this scenario the patient she is currently pregnant with twins at 30 weeks and this is her first pregnancy so gravity' how many times has she been pregnant just once but she's pregnant with twins remember that doesn't matter we're not calculate the number of babies we're just calculating this pregnancy so her gravity' would be one now what would her para be well she hasn't completed the pregnancy yet so her para would be zero now let's switch it up a little bit and let's say that she has completed this pregnancy and the twins were born at 37 weeks that would change the parity it would change it to 1 because she has completed the pregnancy and you wouldn't put 2 because remember we're not calculating the number of babies born we're just calculating the number of pregnancies that were completed okay so that wraps up this review over gravity and parity and don't forget to access the free quiz that will test you on this content and to check out the other reviews in this maternity series