<svg viewBox='0 0 400 400'>
  <path fill="none" stroke="#333" stroke-width="5" d="M200,40 C200,115 280,180 280,240 A80,80,0 0,1,120,240 C120,180 200,115 200,40" stroke-linejoin='miter'></path>
</svg>

var SVG = function() {
  this.element = document.getElementsByTagName("svg")[0];
  this.namespace = "http://www.w3.org/2000/svg";
  this.width = 400;
  this.height = 400;
}

/****Let's initialise our SVG ready to draw our shape****/
var svg = new SVG();

/****This sets up the user interface - we've included the script for this as an external library for the codepen****/
var gui = new dat.GUI();

/****Here's where the code to create the shape begins!****/
var Teardrop = function() {
  this.x = svg.width * 0.5;
  this.y = svg.height * 0.1;
  this.width = svg.width * 0.4;
  this.triangleHeight = svg.height * 0.5;
  this.yCP1 = svg.height * 0.2;
  this.yCP2 = svg.height * 0.45;
  this.element = null;
  this.ctrlPoints = [];
  this.anchors = [];
  this.fill = "none";
  this.stroke = "#333";
  this.strokeWidth = 2;
  this.showCtrlPoints = true;
  this.init();
}

Teardrop.prototype.init = function() {
  this.element = document.createElementNS(svg.namespace, "path");
  svg.element.appendChild(this.element);
  this.element.setAttribute("fill", this.fill);
  this.element.setAttribute("stroke", this.stroke);
  this.element.setAttribute("stroke-width", this.strokeWidth);

  for (var i = 0; i < 3; i++) {
    this.ctrlPoints.push(document.createElementNS(svg.namespace, "circle"));
    svg.element.appendChild(this.ctrlPoints[i]);

    this.ctrlPoints[i].setAttribute("fill", this.fill);
    this.ctrlPoints[i].setAttribute("stroke", 'red');
    this.ctrlPoints[i].setAttribute("stroke-width", 1);


    this.anchors.push(document.createElementNS(svg.namespace, "line"));
    svg.element.appendChild(this.anchors[i]);

    this.anchors[i].setAttribute("stroke-width", 1);
    this.anchors[i].setAttribute("stroke", this.stroke);
    this.anchors[i].setAttribute("stroke-dasharray", "3,2");
  }

  this.draw();
}

Teardrop.prototype.draw = function() {
  this.radius = this.width / 2;
  path = [
    "M", this.x, ",", this.y,
    "C", this.x, ",", this.yCP1, " ", this.x + this.width / 2, ",", this.yCP2, " ", this.x + this.width / 2, ",", this.y + this.triangleHeight,
    "A", this.radius, ",", this.radius, ",", "0 0,1,", this.x - this.width / 2, ",", this.y + this.triangleHeight,
    "C", this.x - this.width / 2, ",", this.yCP2, " ", this.x, ",", this.yCP1, " ", this.x, ",", this.y
  ];
  this.element.setAttribute("d", path.join(""));

  cpCoords = [];
  cpCoords[0] = [this.x, this.yCP1];
  cpCoords[1] = [this.x - this.width / 2, this.yCP2];
  cpCoords[2] = [this.x + this.width / 2, this.yCP2];

  anchorCoords = [];
  anchorCoords[0] = [this.x, this.y];
  anchorCoords[1] = [this.x - this.width / 2, this.y + this.triangleHeight];
  anchorCoords[2] = [this.x + this.width / 2, this.y + this.triangleHeight];

  for (var i = 0; i < 3; i++) {
    this.ctrlPoints[i].setAttribute("cx", cpCoords[i][0]);
    this.ctrlPoints[i].setAttribute("cy", cpCoords[i][1]);

    this.anchors[i].setAttribute("x1", cpCoords[i][0]);
    this.anchors[i].setAttribute("x2", anchorCoords[i][0]);
    this.anchors[i].setAttribute("y1", cpCoords[i][1]);
    this.anchors[i].setAttribute("y2", anchorCoords[i][1]);

    if (this.showCtrlPoints) {
      this.ctrlPoints[i].setAttribute("r", 2);
      this.anchors[i].setAttribute("stroke-width", 1);
    } else {
      this.ctrlPoints[i].setAttribute("r", 0);
      this.anchors[i].setAttribute("stroke-width", 0);
    }
  }
}

var teardrop = new Teardrop();

gui.add(teardrop, 'triangleHeight', 0, svg.height * 0.75);
gui.add(teardrop, 'width', 0, 200);
gui.add(teardrop, 'yCP1', 0, svg.height);
gui.add(teardrop, 'yCP2', 0, svg.height);
gui.add(teardrop, 'showCtrlPoints', 0, svg.height);

for (var i in gui.__controllers) {
  gui.__controllers[i].onChange(function() {
    teardrop.draw();
  });
}

html,
body {
  height: 100%;
}
svg {
  display: block;
  margin: 0 auto;
  background: url('http://unitedshapes.com/images/graph-paper/graph-paper.png');
}

<script src="//cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js"></script>
<svg width='400px' height='400px'></svg>

.tear{
    height:200px;
    width:200px;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 29%,rgba(0,0,0,1) 30%,rgba(0,0,0,1) 100%);
    border-radius:50%;
    margin:120px;
    position:relative;
}
.tear:before{
    content:"";
    position:absolute;
    top:-70%;left:0%;
    height:100%;width:50%;
    background: radial-gradient(ellipse at -50% -50%, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 75%,rgba(0,0,0,1) 76%,rgba(0,0,0,1) 100%);
}
.tear:after{
    content:"";
    position:absolute;
    top:-70%;left:50%;
    height:100%;width:50%;
    background: radial-gradient(ellipse at 150% -50%, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 75%,rgba(0,0,0,1) 76%,rgba(0,0,0,1) 100%);
}

<div class="tear"></div>