What’s new in contraceptive technology?

19 Jun

Lots of great new contraceptive options are coming your way soon if you’re in the United States.  You may have already heard about Skyla, but do you know about Twirla and Cyclofem?  Read on and learn.

Skyla

Skyla (or the levonorgestrel 14 mcg IUD, or LNG-14) recently was approved by the FDA and has received a fair amount of attention.  It is now available from some providers and may be an excellent choice for some women.  The LNG-14 has three claims to fame: its smaller size (and, as a result, smaller inserter), its lower dose of progesterone, and its official approval for use by women who have never been pregnant.

First off, the smaller size: in the grand scheme of things, we’re talking about only a very tiny difference (the IUD itself is 1.1 by 1.2 inches, compared with Mirena’s 1.3 by 1.3 inches, while the inserter is 0.04 inches smaller than Mirena’s; see this great article for more details).  However, that very small difference may in fact make insertion of the device less painful for some women, particularly women who have never been pregnant and may be more likely to have a tighter cervix.  Since the data have yet to be published, I can’t tell you for sure if insertion is indeed less uncomfortable than insertion of other IUDs; however, preliminary presentations of the data (such as here) have indicated that, for women who have never been pregnant, those who underwent insertion of Skyla had less discomfort than those who were assigned to Mirena. 

Skyla releases less progesterone than the Mirena (without losing any of its contraceptive efficacy) which for some women is a good thing, but for others might not be.  One of the features of Mirena that is most appreciated by some users is that almost everyone experiences lighter periods over time, and many women no longer have periods at all.  For some women, that’s fabulous, while others would rather keep seeing their period.  Women using Skyla will mostly have lighter periods, but fewer of them will have no period (though some will, and there is no way to know ahead of time what any individual’s reaction will be).  Although Mirena exposes users to a very low systemic dose of progesterone (a dose low enough that most don’t notice it), for women who are extremely sensitive to artificial hormones it can still be too much.  If you’re in this category but there are reasons why a progesterone-releasing IUD is a good option for you (such as heavy periods), Skyla may be an excellent option.

Finally, on Skyla’s approval for women who have never been pregnant.  This is great news, but really, it’s not news; women who have never been pregnant can safely use any IUD, regardless of what is on the packaging.  We’ve known this for years, and doctors use products and medicines off-label all the time.  There’s nothing wrong with off-label use as long as there is good evidence to show that your practice is safe.  Fortunately, we have decades of data that prove that women who have never been pregnant can safely use any kind of IUD they want.  So the labeling for women who’ve never been pregnant may be generating a lot of buzz, but it’s nothing new.  However, if there are pesky insurance companies out there that won’t pay for IUDs for women who’ve never been pregnant because the label says it’s not OK, this might help push them along, so it can’t be bad.

There’s a lot to love about Skyla.  The smaller size might make it easier and more comfortable to insert for some women, and the lower hormone dose might be beneficial in some cases.  Unfortunately, Skyla only lasts for 3 years (as opposed to 5 for Mirena and 12 or more for the copper-IUD).  For some women who don’t like the idea of something lasting a long time this may a good thing, but for many having to get a new one placed after 3 years could be a drag, as it means another doctor’s visit and potentially more costs.

Twirla

Twirla (also known as AG 200-15) is a new contraceptive patch that uses a combination of progesterone and estrogen, similar to Ortho-Evra.  This method is not yet FDA approved but will likely be approved in the next year.  Twirla has a few claims to fame: its lower estrogen dose and its novel adhesive.  As for the lower estrogen dose, as only a few papers have been published on Twirla thus far, I don’t know for sure if the lower estrogen dose in this patch compared with Ortho-Evra leads to fewer side effects, but it is quite likely it does, and we know that this patch is just as effective as Ortho-Evra.  

So if you’re very sensitive to hormones and want to use a patch, Twirla may turn out to be a great option, especially if the side effects you experience on birth control are related to estrogen (such as nausea, bloating, or headaches) and you have reasons to want to continue using an estrogen-containing method, such as maintaining regular periods or to improve acne.  The novel adhesive may be good news for loyal patch fans who are annoyed by the little bits of adhesive residue that sometimes seep out next to where the patch is applied, or for women who want to use the patch but are among the minority of women for whom it just won’t stay on for the whole week.

Cyclofem

Cyclofem (also known as depot medroxyprogesterone acetate 15 mg/estradiol cypionate 5 mg) is not actually a new contraceptive; rather, it’s a method that’s been around for a while and has never really taken off, either in the US or abroad.  Cyclofem is an injectable contraceptive that was briefly marketed in the US as Lunelle about a decade ago, but has not been available recently.  It is used in some other countries around the world.  It has a lower dose of the progesterone that is used in Depo-Provera, the three-monthly injectable, and unlike Depo-provera also has estrogen.  Cyclofem’s claims to fame: the only combined hormonal injectable method available; convenience of once-monthly dosing.

Although Depo-Provera, or DMPA, is not one of the most popular methods in the U.S., it has loyal followers.  Some of the pros of DMPA are that injections are required only every three months, with a very forgiving window period allowing you to get your shot a few weeks early (in case you’re heading off for vacation) or a few weeks late (up to 15 weeks since the prior injection – considering the busy lives many of us lead, the more likely scenario), and that most women stop having periods within 6 to 12 months of starting the method.  DMPA only includes progesterone; for women who want an injectable that also has an estrogen, Cyclofem could be useful.  Women using Cyclofem generally continue to have regular periods, but the big drawback is that injections have to occur every month.  There are some situations where Cyclofem could be extremely useful; for instance, someone who wants to use a combined hormonal method but can’t swallow pills or someone who requires absolute privacy regarding her use of contraceptives.

Unlike the other new methods I’ve described, it’s hard for me to believe this method will take off in the US context outside of some specialized settings, as the majority of women who can’t take pills will probably be well-served with either a contraceptive patch or ring, and women who need to use an “invisible” method will in most cases do very well with an IUD or a contraceptive implant.  Monthly visits to the doctor for injections are just not practical for most women in a US context.  Despite my pessimism, I do hope that Cyclofem finds its niche; more choices are always better, and there will always be women who find that a given method works very well for them.

What about plans for the next five and ten years?  There are lots of great products in the works, from a much lower-cost generic version of the Mirena IUD being developed by Medicines360 (this could really be a game changer for women in many low-income countries; not only is the levonorgestrel IUD a great contraceptive method, but it also is a first-line treatment for many other gynecological conditions that are currently treated with surgery in settings where it is unavailable) to a contraceptive vaginal ring that can be used for a whole year.  A new female condom that may be easier to use and more comfortable is also in the works.

Acknowledgments: This post was inspired by a great webinar from the Association of Reproductive Health Professionals.

About these ads

One Response to “What’s new in contraceptive technology?”

  1. Divine Oubliette June 23, 2013 at 6:53 am #

    Gynefix 330 (standard) is a framless IUD that’s stitched into the fundus, it has 6 beads of copper, 330 sq mm of copper, it’s good for 5 yrs.

    Gynefix 200 (mini) is a framless IUD that’s stitched into the fundus, it has 4 beads of copper, 200 sq mm of copper, it’s good for 3 yrs.

    Another IUD that will probably soon to market also, Frameless Levonorgestrel IUD – FibroPlant™ – LNG releases 14 μg of LNG per day.
    http://iud-divas.livejournal.com/3404855.html

    Meanwhile I personally love my Flex T 300, it’s a T framed IUD with 300 sq mm of copper, with very cleverly designed arms for an extra secure placement, the 300 is also their smallest Flex T available both in size and copper content. Special ordered from Canada to Texas for my extra small uterus.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: